How would you solve - 7x+y=-19 and - 2x+3y=-19 with elimination or substitution

Question

Mathematics

Jazmyn Larsen

22 July, 15:25

How would you solve - 7x+y=-19 and - 2x+3y=-19 with elimination or substitution

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Answers (2)

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Quintin · Answer 1

-7x + 1y = - 19 ⇒ 14x - 2y = 38

-2x + 3y = - 19 ⇒ 14x - 21y = 133

19y = - 95

19 19

y = - 5

-7x + (-5) = - 19

-7x - 5 = - 19

+ 5 + 5

7x = - 14

7 7

x = - 2

(x, y) = (-2, - 5)

Tori Logan · Answer 2

You could solve it with elimination by multiplying the whole first equation by - 3 and then once you do that you can cancel out the 3's.