Question

X + y = 4

x - 2y = -5

If the first equation is multiplied by 2 and then the equations are added, the result is _____.

3x = 13
3x = 3
x = 3

Answer 1

Well it would come out to 2x-3y=-9

Explanation:

Answer 2

Here's how you solve this problem:

1) Multiply the first equation by 2 (result:2x+2y=8).

2) Add both equations together (result:2x+x+2y-2y=8-5)

3) Simplify (result:3x=3)

The answer is 3x=3.

This could be simplified more, however, to equal x=1, since both sides are divisible by 3.

p.s. Have a good day!