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2 years ago

12) -7x + y=-19 -2x + 3y =-19 Solve by elimination

Mathematics

1 answer:

asambeis [7]2 years ago

5 0

X = 2

Y = -5

Step-by-step explanation:

We will multiply -7x + y=-19 by 3 so we can make the ys identical with the second equation. This way, its easier to eliminate them;

3(-7x + y=-19) =

-21x + 3y = -57

Then we can eliminate the ys by elimination. Be keen with the sign before each value;

-21x + 3y = -57

-2x + 3y =-19

-19x = - 38

X = -38 / -19

X = 2

We can substitute the value of x in one equation get the value of y;

-7(2) + y = -19

-14 + y = -19

Y = -19 +14

Y = -5

Learn More:

For more on solving equations by elimination check out;

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