Question

помогите решить уравнения
15х-23=17х+7
30-5х=9+12х​

Answer 1

1)

15х-23=17х+7

15x-17x=7+23

-2x=30

X=30 : (-2)

X=-15

2)

30-5х=9+12х

-5x-12x=9-30

-17x=-21

X=-21 : (-17)

X=21/17=1 4/17.

Удачи))

Answer 2

$1)15 x - 23 = 17x + 7 \\ \\ 15x - 17x = 7 + 23 \\ \\ - 2x = 30 \\ \\ x = 30 \div ( - 2) \\ \\ x = - 15 \\ \\ \\ \\ 2)30 - 5x = 9 + 12x \\ \\ - 5x - 12x = 9 - 30 \\ \\ - 17x = - 21 \\ \\ x = \frac{21}{17} \\ \\ x = 1 \frac{4}{17}$

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