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2014-11-14T16:08:01+02:00
2x+15=232x=23-15
2x=8
x=8:2
x=4

156-3x=183x=156-18
3x=138
x=138:3
x=46


124-5x=695x=124-69
5x=55
x=55:5
x=11


13x-39=16913x=169+39
13x=208
x=208:13
x=16



7x+21=637x=63-21
7x=42
x=42:7
x=6


4x-35=294x=29+35
4x=64
x=64:4
x=16


12x+72=14412x=144-72
12x=72
x=72:12
x=6


2x-11=372x=37+11
2x=48
2x=48:2
x=24


120-7x=577x=120-57
7x=63
x=63:7
x=9


3x-11=1453x=145+11
3x=156
x=156:3
x=52
6 3 6