Answer:
B) 7
Step-by-step explanation:
y = x -10 -------------(I)
5x + y = 32 ----------------(II)
Substitute y = x - 10 in equation (II)
5x + (x - 10) = 32
5x + x - 10 = 32
6x - 10 = 32
Add 10 to both sides
6x - 10 + 10 = 32+10
6x = 42
Divide both sides by 6
x = 42/6
x = 7
Plugin x = 7 in equation (I)
y = 7 - 10
y = -3
