Question

1)resolva as equações:
a)4x+9=x-9
b)5x-3+2x=x+3x
c)2x+4-x=2(x+1)
d)5x+23=98
e)5x-2(x-7)-6=17
f)3(2x-3)-3x+12=27

Answer 1

A)4x+9=x-9
4x-x=-9-9
3x=-18
x=-18/3
x=-6

B)5x-3+2x=x+3x
7x-3=x+3x
7x-3=4x
7x-4x=3
3x=3
x=3/3
x=1

C)2x+4-x=2(x+1)
2x+4-x=2x+2
x+4=2x+2
4-2=2x-x
2=2x
x=2/2
x=1

D)5x+23=98
5x=98-23
5x=75
x=75/5
x=15

E)5x-2(x-7)-6=17
5x-2x+14-6=17
3x+8=17
3x=17-8
3x=9
x=9/3
x=3

F)3(2x-3)-3x+12=27
6x-9-3x+12=27
6x-3x=27+9-12
3x=36-12
3x=24
x=24/3
x=8