Question

Rezolvati ecuatiile in multimea numerelor intregi:
$a) \: 9 \times (x - 7) = - 63 \\ b)5 \times (x + 3) = 3 \times (x - 5)$
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Answer 1

a)

9x-63=-63

9x=-63+63

9x=0

x=0

b)

5x+15=3x-15

5x-3x=-15-15

2x=-30

x=-15

Answer 2

9x-63=-63

9x=0/:9

x=0

5x+15=3x-15

5x-3x=-15-15

2x=-30/:2

x=-15

Sper ca am ajutat