Question

Solve each equation for both variables help please 15 points

Answer 1

x = -6, y = 3

Explanation:

1) 4x + 3y = -15

2) 4x - y = -27

0 + 4y = 12 subtract equation (2) from equation (1)

4y = 12

y = 12/4 = 3 substitute y = 3 into either equation 1 or 2 and solve for x

4x + 3(3) = -15

4x = -24

x = -6

Check your answers by plugging x = -6, y = 3 into the equations:

4(-6) + 3(3) = -15 correct!

4(-6) - 3 = -27 correct!

Answer 2

x = 12 and y = 11

Explanation:

4x+3y=-15 -----equation 1st

4x-y = -27 ____equation 2nd

then,

Multiple equation second by 3 and slove it with equation first

4X +3Y = -15

12X -3Y = -81 (Multiples it with 3)

-8x = -96 (subtracted)

x=-96/-8

therefore, x=12

again,

from equation first

4x+3y = -15

or 4 × 12 + 3y = -15

or 3y = -15+48

or 3y= 33

or y=33/3

therefore, y =11

I hope this helps. If you have any doubt feel free to ask!!