Решите уравнения на множестве Z
x+70= -100

3*x=81

x:(-8)= -20

3x+72=0

1)х=-100-70   х=302)х=81/3     х=273)х=-20*(-8)    х=1604)3х=-72  х=-72/3 х=-24

x+70= -100x = -100 -70x = -170 3*x=81x = 81 : 3x = 27 x:(-8)= -20x = -20 *(-8)x = +160 3x+72=03x = -72x = - 72 :3x= - 24