Question

Решите уравнения на множестве Z
x+70= -100

3*x=81

x:(-8)= -20

3x+72=0

Answer 1

1)х=-100-70   х=30
2)х=81/3     х=27
3)х=-20*(-8)    х=160
4)3х=-72  х=-72/3 х=-24

Answer 2

x+70= -100
x = -100 -70
x = -170

3*x=81
x = 81 : 3
x = 27

x:(-8)= -20
x = -20 *(-8)
x = +160

3x+72=0
3x = -72
x = - 72 :3
x= - 24