Пошаговое объяснение:
1) (X-10):2=20
x - 10 = 20 x 2
x - 10 = 40
x = 40 + 10
x = 50
2)(X+10)*2=20
x + 10 =20 : 2
x + 10 = 10
x = 10 - 10
x = 0
3)X*10-2=8
x *10 = 8 + 2
x * 10 = 10
x = 10 : 10
x = 1
4)X:10+2=8
x : 10 = 8 - 2
x : 10 = 6
x = 6 * 10
x = 60
Пошаговое объяснение:
1) (X-10):2=20
x - 10 = 20 x 2
x - 10 = 40
x = 40 + 10
x = 50
2)(X+10)*2=20
x + 10 =20 : 2
x + 10 = 10
x = 10 - 10
x = 0
3)X*10-2=8
x *10 = 8 + 2
x * 10 = 10
x = 10 : 10
x = 1
4)X:10+2=8
x : 10 = 8 - 2
x : 10 = 6
x = 6 * 10
x = 60