Question

СРОЧНО ПОМОГИТЕ:
1. 9х+13=7х+5
2. 3(2х+5)+6=3
3. 5х+18=7х+6(3х-7)
4. 3х-7(3х-4)=5(2х-7)
5. 13-3(5х+1)-6(4х-3)=5х
6. 4(х+2)-0,7=2(2х+4)+0,3

Answer 1

1. 9х+13=7х+5            2. 3(2х+5)+6=3        3. 5х+18=7х+6(3х-7)

2х=-8                            6х+15+6=3              -20х=-60

х=-4                               6х=-18                    х=3

                                       х=3

4. 3х-7(3х-4)=5(2х-7)       

-28х=-63                             

х=2,25