решите уровнение: а)2х-3(4-х)=5-(х-1) б)8(3-2х)-(х-2)=9 в)5х-6(2х+7)=13-(х+1)

Question

решите уровнение:

а)2х-3(4-х)=5-(х-1)

б)8(3-2х)-(х-2)=9

в)5х-6(2х+7)=13-(х+1)

Answer 1

2х-3(4-х)=5-(х-1)

5x-12 = 6-x

5х+х=12+6

6х=18

х=3

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8(3-2х)-(х-2)=9

8(3-2 x)-x+2 = 9

24-16х-х+2=9

17-17 x = 0

x = 1

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5х-6(2х+7)=13-(х+1)

5 x-6 (2 x+7) = 12-x

5х-12х-42=12-х

-6 x-54 = 0

x = -9