12y - 4 = -4y - 416y = 0y = 0
2)7(2x-3)-x=3x-1114x - 21 - x = 3x - 1113x - 21 = 3x - 1110x = 10x = 1
3)-100+5(y+10)=0-100 + 5y + 50 = 05y - 50 = 1005y = 150y = 30
4)12-(y-2) = 312 - y + 2 = 314 - y = 3-y = -11y = 11
5)6 - 3(x+1) = 7 - x6 - 3x - 3 = 7 - x3 - 3x = 7 - x-3x = 4x = -4
6)7x - 3 = -30 - 2x9x = -27x = -3
7)5.4 - 1.5y = 0.3y - 3.65.4 = 1.8y - 3.61.8y = 9y = 5
8)2(2y-4) = 3y + 14y - 8 = 3y + 1y = 9
9)6.8 - 1.3x = 0.6x - 2.76.8 = 1.9x - 2.71.9x = 9.5x = 5
10)5.6 - 3(2-0.4x) = 0.4(4x-1)5.6 - 6 + 1.2x = 1.6x - 0.41.2x + 1.6x = 0.4 + 6 - 5.62.8x = 0.8x = 0.2857
12y - 4 = -4y - 4
16y = 0
y = 0
2)7(2x-3)-x=3x-11
14x - 21 - x = 3x - 11
13x - 21 = 3x - 11
10x = 10
x = 1
3)-100+5(y+10)=0
-100 + 5y + 50 = 0
5y - 50 = 100
5y = 150
y = 30
4)12-(y-2) = 3
12 - y + 2 = 3
14 - y = 3
-y = -11
y = 11
5)6 - 3(x+1) = 7 - x
6 - 3x - 3 = 7 - x
3 - 3x = 7 - x
-3x = 4
x = -4
6)7x - 3 = -30 - 2x
9x = -27
x = -3
7)5.4 - 1.5y = 0.3y - 3.6
5.4 = 1.8y - 3.6
1.8y = 9
y = 5
8)2(2y-4) = 3y + 1
4y - 8 = 3y + 1
y = 9
9)6.8 - 1.3x = 0.6x - 2.7
6.8 = 1.9x - 2.7
1.9x = 9.5
x = 5
10)5.6 - 3(2-0.4x) = 0.4(4x-1)
5.6 - 6 + 1.2x = 1.6x - 0.4
1.2x + 1.6x = 0.4 + 6 - 5.6
2.8x = 0.8
x = 0.2857