Answer:
x=3 and y=3
Step-by-step explanation:
−x+8y=21for x:
−x+8y=21
−x+8y+−8y=21+−8y(Add -8y to both sides)
−x=−8y+21
−x
−1
=
−8y+21
−1
(Divide both sides by -1)
x=8y−21
Step: Substitute8y−21forxin−4x+2y=−6:
−4x+2y=−6
−4(8y−21)+2y=−6
−30y+84=−6(Simplify both sides of the equation)
−30y+84+−84=−6+−84(Add -84 to both sides)
−30y=−90
−30y
−30
=
−90
−30
(Divide both sides by -30)
y=3
Step: Substitute3foryinx=8y−21:
x=8y−21
x=(8)(3)−21
x=3(Simplify both sides of the equation)
