Answer:
x = -1
Step-by-step explanation:
y = 5x + 9 ........1
y = -x + 3 ........2
making x the subject of formula from equation 2
x = 3 - y ........3
substituting equation 3 in 1, we have
y= 5(3 -y) + 9
y = 15 - 5y + 9
y + 5y = 15 + 9
6y = 24
y = 24 / 6
= 4
substituting y = 4 in equation (3)
x = 3 - 4
x = -1
