Odpowiedź:
- 4x +6 = 30 I -6
-4x= 24 I :(-4)
x= - 6
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- 8x +10 = 4 I-10
-8x= -6 I : (-8)
x= 6/8= 3/4
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2x- 12 =6 I +12
2x= 18 I :2
x=9
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9-x= 21 I -9
-x= 12 i *(-1)
x= - 12
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4 + 5x= 34 I-4
5x= 30 I :5
x=6
1/3 x -4= 5 I+4
1/3 x= 9 I:1/3
x=27
Szczegółowe wyjaśnienie:
9 - x = 21
-x + 9 = 21
x = -12
1/3x - 4 = 5
1x/3 - 4 = 5
x/3 - 4 = 5
x/3 - 4 + 4 = 5 + 4
x/3 = 9
3 * x/3 = 3 * 9
x = 27
