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# Online Algebra Tutoring: Simultaneous Equations (Substitution)

Our math tutors understand that math is a valuable skill and have devised strategies to equip your child with better understanding of the new terminologies and methods. With expert math tutors, live interactions and a library of resources, 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

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Site by Little Red Bird Our mission is to provide high quality online tutoring services, using state of the art Internet technology, to school students worldwide.

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

English Tutoring
Writing
Grammar