solve using the substitution method:

Question

8x+5y=-12
x=12-4y

Answer 1

x=12-4y

8x+5y= -12

8*(12-4y)+5y= -12

8*12-8*4y+5y= -12

96-32y+5y= -12

96-27y= -12

96+12=27y

108=27y Divide with 27

4=y

y=4

x=12-4y

x=12-4*4

x=12-16

x= -4