Question

2х - 7 =х+4

-0.7 *(5-x)=-4.9

Решите уравнения Даю много

Answer 1

2х-х=4+7
1х=11
х=11

-3.5+х=-4.9
х=-4.9+3.5
х=-1.4

Answer 2

2x-7=x+4
2x-x=4+7
x=11

-0.7*(5-x)=-4.9
3.5-0.7x=-4.9
-0.7x = -4.9-3.5
-0.7x=-8.4
x=-8.4÷(-0.7)
x=12