a) -3x + 9x = -12x6x = -12x
b) 5y + (6y - 4) = 05y + 6y - 4 = 011y - 4 = 011y = 4y = 4/11
c) -2(x - 4) + 4(x - 2) = 0-2x + 8 + 4x - 8 = 02x = 0x = 0
d) 3(y - 6) - 12(y - 1.5) = 183y - 18 - 12y + 18 = 18-9y = 18y = -2
a) -3x + 9x = -12x
6x = -12x
b) 5y + (6y - 4) = 0
5y + 6y - 4 = 0
11y - 4 = 0
11y = 4
y = 4/11
c) -2(x - 4) + 4(x - 2) = 0
-2x + 8 + 4x - 8 = 0
2x = 0
x = 0
d) 3(y - 6) - 12(y - 1.5) = 18
3y - 18 - 12y + 18 = 18
-9y = 18
y = -2