Question

resolva as equações.

A)5x+3x=16

B)x+x+8=54

C)7x-2-5x=18

D)12x-10x-4=3

E)-x-2x-4=11

F)8x=5x+4,5

Answer 1

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

B)
x+x+8=54
2x=54-8
2x=46
x=46/2
x=23

C)
7x-2-5x=18
7x-5x=18+2
2x=20
x=20/2
x=10

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

E)-x-2x-4=11
-x-2x=11+4
-3x=15 (*-1)
3x=-15
x=-15/3
x=-5

F)
8x=5x+4,5
8x-5x=4,5
3x=4,5
x=4,5/3
x=1,5