РУШИТЕ ПЖ. ДОЮ 25 БАЛЛОВ КОНТРОЛЬНАЯ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

1)2x-(x+4)=5(x-2)

2)(5x-2)*(1/4x-9)=0

3)|2x-4|+3=5

4)7-2(x-3)=5x-8(x-3)

Ответ:

1)2x-(x+4)=5(x-2)

2x-x-4=5x-10

x-4=5x-10

x-5x=4-10

-4x=-6

x=1,5

2)(5x-2)×(1/4x-9)=0

1. 5x-2=0 или 1/4x-9=0

5x=2 1/4x=9

x=0,4 x=36

3)|2x-4|+3=5

2x-4=2 или 2x-4=-2

2x=6 2x=2

x=3 x=1

4)7-2(x-3)=5x-8(x-3)

7-2x+6=5x-8x+24

13-2x=-3x+24

13-24=2x-3x

-11=-x

x=11