- x + x + x + x + x = 5 · x = 5x
- 3x + 5x = x + x + x
+ x + x + x
+ x + x = 8x
- 6x – 2x = 4x
- 4x – 3 + 2x + 5 = 6x + 2
- 5x + (3 – x) = 5x + 3 – x = 4x + 3
- 4x – (8 – 2x) = 4x – 8 + 2x = 6x – 8
- (3x – 5) – (5 – 2x) = 3x – 5 – 5 + 2x = 5x –10
- 3(x + 1) = (3·x + 3·1) = 3x + 3
- 2x – 4(5 – x) = 2x – (4·5 – 4·x) = 2x – (20 – 4x) = 2x
– 20 + 4x = 6x –20
- 2(5 – x) – 3(x – 2) = (2·5 – 2·x) – (3·x – 3·2) = (10
– 2x) – (3x – 6) = 10 – 2x – 3x + 6 = –5x + 16
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