3 y = 84 - 6 x Divide both sides by 3
y = 28 - 2 x
3 x - 21 = 2 y
3 x - 21 = 2 ( 28 - 2 x )
3 x - 21 = 56 - 4 x
3 x + 4 x = 56 + 21
7 x = 77 Divide both sides by 7
x = 77 / 7
x = 11
y = 28 - 2 x
y = 28 - 2 * 11
y = 28 - 22
y = 6
D.6
3x - 21 = 2y
3y = 84 - 6x
Using the two equations above, solve for y.
A.11
B.35
C.-6
D.6
1 answer