Question

2 resolva as equações.
a) 5x+3x= 16
b) x+x +8= 54
c ) 7x-2-5x = 12
d ) 12x-10x-4=3

Answer 1

a) 5x+3x=16
8x=16
x=16/8
x=2
b) x+x+8=54
2x+8=54
2x=54-8
2x=46
x=46/2
x=23
c) 7x-2-5x=12
7x-5x=12+2
2x=14
x=14/2
x=7
d) 12x-10x-4=3
12x-10x=3+4
2x=7
x=7/2

Answer 2

a) 5x+3x=16
    8x=16
    x=16/8
    x=2

b) x+x+8=54
    2x=54-8
    2x=46
    2x=23

c) 7x-2-5x=12
    7x-5x=12+2
    2x=14
    x=14/2
    x=7

d) 12x-10x-4=3
    12-10x=3+4
     2x=7
     x=7/2 ou 3,5