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Dumiqr
a fost răspuns

1) 21x + 63 = 12 × (x +9) =
2) 31x + 272 = 8 × (5x + 34) =
3) 15x + 418 = 7 × (2x + 61) =
4) 16x + 332 = 5 (3x + 68) =

Răspuns :

Olesea49

Răspuns:

1)21x + 63 = 12x + 108

21x-12x = 108 - 63

9x = 45

x = 45/9

x = 5

2)31x - 40x = 272 - 272

- 9x = 0

x = 0

3)15x - 14x = 427 - 418

x = 9

4)16x -15x = 340 - 332

x = 8

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