# Online Algebra Tutoring: Simultaneous Equations (Substitution)

**eTutorWorld**is the perfect match to hone your Math skills.

**eTutorWorld**is the best virtual platform to develop your learning skills. Access your sessions easily from your computer, laptop, tablet or even your smart phone and schedule a math online tutoring session with our expert subject tutors!

## Learn Simultaneous Equations from Online Algebra Tutor

In this method, we choose any one equation from the given set of two equations and we solve that equation for **y**, we substitute the value of y into the other equation. After putting the value of **y** in the other equation, we get equation in only one variable that is **x**, we can solve this equation and substitute the value of **x** into any one equation.

**Example:** **a) y + x = 8 equation 1**

**b) y – 2x = 11 equation 2**

**Step 1:** Choose the first equation and solve for y.

y = 8 – x

**Step 2:** We plug in this value of y into equation 2.

y – 2x = 11

8 – x – 2x = 11

8 – 3x = 11

**Step 3:** Subtract 8 from both sides.

8 – 8 – 3x = 11 – 8

-3x = 3

**Divide both sides by -3.**

**(-3x / -3) = 3 / -3**

**x = -1**

**Step 4:** Plug in x = -1 back into the first equation.

y + x = 8

y – 1 = 8

**Solution: y=9 and x = -1.**

**Checkpoint:**

Solve system of linear equations by substitution method:

1.)y = x – 1 , 2x − 3y = −1

2.)x – 9y = –24, x + 7y = 24

3.)x + y = –5, 3x + y = –21

4.)−3x + 3y = 3, −5x + y = 13

5.)−7x + 8y = −5, −2x + 6y = 6

## Personalized Online Tutoring

eTutorWorld offers affordable one-on-one live tutoring over the web for Grades 2-12, Test Prep help for Standardized tests like SCAT, CogAT, SSAT, SAT, ACT, ISEE and AP. You may schedule online tutoring lessons at your personal scheduled times, all with a Money-Back Guarantee. The first one-on-one online tutoring lesson is always FREE, no purchase obligation, no credit card required.

For answers/solutions to any question or to learn concepts, take a **FREE Demo Session**.

*No credit card required, no obligation to purchase. *

*Just schedule a FREE Sessions to meet a tutor and get help on any topic you want!*

## Pricing for Personalized Online Tutoring

Tutoring Package | Validity | Grade (1-12), College |
---|---|---|

5 sessions | 21 Days | $114 |

1 session | 21 Days | $24 |

10 sessions | 2 months | $219 |

15 sessions | 3 months | $319 |

20 sessions | 3 months | $409 |

50 sessions | 6 months | $949 |

100 sessions | 10 months | $1849 |

## IN THE NEWS

Home

Summer Courses 2021

Tutoring

Test Prep

Worksheets

Pricing

About Us

Blog

Free Trial

Login

Terms of service

Privacy Policy

Money Back Guarantee

Technical requirements

FAQs

Job Opportunities

Sitemap

**Connect with us**

+1-269-763-4602

+1-269-763-5024

**Online test prep and practice**

SCAT

CogAT

SSAT

ISEE

PSAT

SAT

ACT

AP Exam

**Science Tutoring**

Physics Tutoring

Chemistry Tutoring

Biology Tutoring

**Math Tutoring**

Pre-Algebra Tutoring

Algebra Tutoring

Pre Calculus Tutoring

Calculus Tutoring

Geometry Tutoring

Trigonometry Tutoring

Statistics Tutoring

©2021 eTutorWorld Terms of use Privacy Policy Site by Little Red Bird

©2021 eTutorWorld

Terms of use

Privacy Policy

Site by Little Red Bird