4 years ago

Is (3,-2) the solution to this system of equations? Yes or no (circle one) -2x-4y=2 3x+4y=8

Mathematics

1 answer:

rodikova [14]4 years ago

8 0

Answer:

(2,−1)

Explanation:

The quickest way is to use elimination

3x+4y=2

2x−4y=8

−−−−−

5x =10

⇒ x=2

Now substitute into one of the original eqns.

3×2+4y=2

6+4y=2

4y=−4⇒y=−1

check in other eqn.

2x−4y=8

2×2−(4×−1)=4−−4=4+4=8√

solns (2,−1)

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