Question

resolva as equações:

a)7x+8=4x-10
b)4x-15=-2x+3
c)2x-4-8=4x
d)3x=x+1+7
e)360+36x=30x
f)2x+5-5x=-1
g)5+6x=5x+2
h)x+2x-1-3=x

Answer 1

A. 7x+8=4x-10
7x-4x=-10-8
3x=18
x=18\3
x=6

B. 4x-15=-2x+3
4x+2x=+3+15
6x=18
x=18\6
x=3

C. 2x-4-8=4x
2x-4x=+4+8
2x=12
x=12\2
x=6

D. 3x=x+1+7
3x-x=+1+7
2x=8
x=8\2
x=4

E. 360+36x=30x
36x-30x=360
6x=360
x=360\6
x=60

F. 2x+5-5x=-1
2x-5x=-1-5
3x=6
x=6\3
x=2

G. 5+6x=5x+2
6x-5x=+2-5
x=3

H. x+2x-1-3=x
x+2x+x= +1+3
4x=4
x=4\4
x=1