Question

calcule o valor de x nas equações.


a) 3x +25= x +35


b)2x -10=20


c)3x + 18 =46-x


d)5x-3=x + 13

Answer 1

A)3x +25 = x +35
3x -x=35 - 25
2x=10
x=10/2
x=5

B)2x - 10=20
2x = 20 + 10
2x=30
x=30/2
x=15

C) 3x + 18 = 46 - x
3x + x=46 -18
4x=28
x=28/4
x= 7

D)5x - 3 = x + 13
5x - x = 13 + 3
4x=16
x=16/4
x = 4