Solve the following system of equations by linear combination: 5x 2y = 14 y = x - 7

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Mathematics

12 November, 03:12

Solve the following system of equations by linear combination: 5x 2y = 14 y = x - 7

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Sariah Harrell · Answer 1

I would use subsitution

y=x-7

sub x-7 for every x

5x+2 (x-7) = 14

5x+2x-14=14

add 14 to both sides

7x=28

divide both sides by 7

x=4

sub

y=x-7

y=4-7

y=-3

x=4

y=-3

(4,-3)