Question

Solve the system of linear equations by substitution for x and y

1. X+y=7
Y=-3

2. 3x+4y=-10
X=-3y

Answer 1

(10,5)

Explanation:

●x+(-3)=7

x=7+3

x=10

●3x+4y=-10

3(-3y)+4y=-10

-6y+4y=-10

-2y=-10

y=5