Решите уравнение: 1) (x + 8) : 9 = 12, 2) x : 9 - 8 = 12, 3) 72 : (x - 6) = 12, 4) 72 : x...

Question

Решите уравнение: 1) (x + 8) : 9 = 12, 2) x : 9 - 8 = 12, 3) 72 : (x - 6) = 12, 4) 72 : x -6 = 12

Answer 1

1) (x+8):9=12
x+8=9*12
x+8=108
x=108-8
x=100
2) (x:9)-8=12
x:9=12+8
x:9=20
x=20*9
x=180
3) 72:(x-6)=12
x-6=72:12
x-6=6
x=6+6
x=12
4)72:x-6=12
72:x=12+6
72:x=18
x=72:18
x=4

Comments

thank you