1) -5x + 3(3 + 2x) = -5x + 9 + 6x = x = -7
2) 30 - x = 3(20 - x30 - x = 60 - 32x = 3x = 15
3) 2u - 3(7 - 2u) = 2u - 21 + 6u = 8u = 2u = 3
4) 12 - y = 5(4 - 2y) + 112 - y = 20 - 10y + 19y = 1y = 2
5) 2 - 2(x - 8) = 4x - 2 - 2x + 16 = 4x - 20 - 2x = 4x - 6x = 2x = 4
6) 2.5z - 3 = z - 4.1.5z = -1.z = -1
7) 3x + 5 = 0.5x + 12.5x = x = 2
8) 2.6 + 2x = 1.9 + 6.2x = 5.x = 2.95
1) -5x + 3(3 + 2x) =
-5x + 9 + 6x =
x = -7
2) 30 - x = 3(20 - x
30 - x = 60 - 3
2x = 3
x = 15
3) 2u - 3(7 - 2u) =
2u - 21 + 6u =
8u = 2
u = 3
4) 12 - y = 5(4 - 2y) + 1
12 - y = 20 - 10y + 1
9y = 1
y = 2
5) 2 - 2(x - 8) = 4x -
2 - 2x + 16 = 4x -
20 - 2x = 4x -
6x = 2
x = 4
6) 2.5z - 3 = z - 4.
1.5z = -1.
z = -1
7) 3x + 5 = 0.5x + 1
2.5x =
x = 2
8) 2.6 + 2x = 1.9 + 6.
2x = 5.
x = 2.95