Question

if you were to solve the following system by substitution, what would be the best variable to solve for and from what equation? 2x+8y=12 3x-8y=11

Answer 1

see below

Explanation:

2x+8y=12 3x-8y=11

If we have to solve by substitution, Take the first equation and divide by 2

2x/2 + 8y/2 =12/2

x+4y = 6

Then subtract 4y from each side

x = 6 -4y

Then substitute this into the second equation

This is best solved by elimination

2x+8y=12

3x-8y=11

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5x = 36

x = 36/5