How to solve a system of two linear equations with two unknowns? {7(a+b)=b−a, 4(3a+2b)=b−8

easternerjx 2022-09-26 Answered
How to solve a system of two linear equations with two unknowns?
{ 7 ( a + b ) = b a 4 ( 3 a + 2 b ) = b 8
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Answers (2)

ruinsraidy4
Answered 2022-09-27 Author has 17 answers
Here is a different approach:
{ 7 ( a + b ) = b a 4 ( 3 a + 2 b ) = b 8
Then
[ 8 6 0 12 7 8 ] [ 1 3 / 4 0 12 7 8 ] [ 1 3 / 4 0 0 2 8 ] [ 1 3 / 4 0 0 1 4 ] [ 1 0 3 0 1 4 ]
Resulting in a = 3 and b = 4.
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Lustyku8
Answered 2022-09-28 Author has 2 answers
Try to perform algebra on both the equations till you have the 𝑎 and 𝑏 on one side and a number on the other. Then see if you can "combine" them together.
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