Решите уравнения.

3 (x+5) = 7-5x: 4 (x-9) = 3 (x-8) 7 (3-2x) = 15 (1-x)

2 задания

Решите уравнения

13 - (2x-5) = x-3 26 - (17-2x) = 5x

3 (х+5) = 7-5 х

3 х+15=7-5 х

3 х+5 х=7-15

8 х=-8

х=-1

4 (х-9) = 3 (х-8)

4 х-45=3 х-24

4 х-3 х=-24+45

х=21

7 (3-2 х) = 15 (1-х)

21-14 х=15-15 х

-14 х+15 х=15-21

х=-6

13 - (2x-5) = x-3

13-2 х+5=х-3

-2 х-х=-3-13-5

-3 х=-21

х=7

26 - (17-2x) = 5x

26-17+2 х=5 х

2 х-5 х=-26+17

-3 х=-9

х=3

3 (х+5) = 7-5 х 4 (х-9) = 3 (х-8) х=12

3 х+15=7-5 х

3 х+5 х=7-15

8 х=-8

х=1