1)11х-9=4х+19 2)7х-5(2х+1)=5х+15

Question

1)11х-9=4х+19 2)7х-5(2х+1)=5х+15

Answer 1

11х - 4х = 19+9
7х = 28
х= 4

- 5(2х+1) = 5х-7х+15
-10х - 5 = -2х +15
-8х = 20
х = 20/ (-8)
х = -2,5

Answer 2

1)x=4 2)x= минус пять вторых,запиши дробью