Question

resolva as equações a seguir a)12x - 48=60 b) 4x+18 =82 c)15x-124 =326 d) 7-4x=-13 ?

Answer 1

a) 12x-48=60
12x=60+48
12x=108
x=108/12
x=9

b) 4x+18=82
4x=82-18
4x=64
x=64/4
x=16

c)15x-124=326
15x=326+124
15x=450
x=450/15x=30

d)7-4x=-13
-4x=-13-7
-4x=-20
x=-20/-4
x=+5

Answer 2

A ) 12x - 48 = 60
12x = 60 + 48
12x = 108
x = 108/ 12
x = 9
b) 4x + 18 = 82
4x = 82 - 18
4x = 64
x = 64/4
x = 15
c) 15x - 124 = 326
15x = 326 + 124
15x = 450
x = 450 /15
x = 30
d) 7 - 4x = - 13
- 4x = - 13 - 7 ( - 1 )
4x = 13 + 7
4x = 20
x = 20/4
x = 5