Online Algebra Tutoring: Simultaneous Equations 1
Learn Simultaneous Equations 1 from Online Algebra Tutor
In this method, we eliminate one variable (say x) to find the value of the other variable (y) and then put back the value of y in the original equation to find the value of the x . This can be done by adding the equations if they have the opposites (like 2y and – 2y are opposites). Let us see how this method works with an example
Solve system of linear equations by elimination method 2x + 3y = 15 equation 1 x – 3y = 3 equation 2 Step 1: These are two equations, we will first line up the variables (if they are not lined up) 2 x + 3y = 15 x – 3y = 3 Step 2: Here we have opposites 3y and – 3y , so we will simply add the equations to eliminate y variable 2 x + 3 y = 15 x – 3y = 3 3 x = 18 x = 6 Step 3: Putting this value back of x into any one original equation. We are putting in equation 2 x – 3y = 3 6 – 3y = 3 -3y = 3 – 6 -3y = -3 y = 1 Solution x = 6 , y = 1 or (6 , 1).
Solve these systems of Equations by Elimination method
- 2x – y = 17, x – y = 10
- –2x + y = 10, 4x – y = –14
- –x – 3y = 18, 2x + 3y = –12
- 2x + 7y = 21, 3x + 7y = 14
- y = −4x – 18 , y = 4x + 22
Why eTutorWorld ?
- Learn at any time and from anywhere through unique personal lesson plans
- Experience the extensive use of online resources and state-of-the-art technology
- Enjoy one-on-one live personalized coaching
- Navigate your homework with ease and learn advanced topics
Find out how eTutorWorld can help you improve your Grades.
No credit card is required, nor are you under any obligation to make a purchase. Just schedule the FREE TRIAL lesson to meet a tutor & get help on any topic you want!
Our Learning by Design methodology focuses exclusively on the individual student. Our tutors are specially trained to identify and diagnose the needs and interests of each student and plan lessons accordingly.
Find more about our Personalized Online Tutoring Learning Packages.
Give Your Child The eTutorWorld Advantage
Research has proven that personal online tutoring not just cements school learning, it helps build student confidence. Come to eTutorWorld for Expert Tutors and best K-12 Online Tutoring Services in the comfort and safety of your home at an affordable cost. Find a tutor online for Grade 3-12 Math, Science and English subjects and AP, SAT, SSAT and SCAT Test Prep help and test practice. Get free printable math and science worksheets in pdf format and SCAT Practice Tests. Sign up for a Free Trial Lesson Today!
© 2018 eTutorWorld - Online Tutoring and Test Prep | All rights reserved