Question

Resolva as seguintes equações
a) 6x=2x+28
b) 3 (x+2)=15
c) 2 (x-1)-7=16
d) 7 (x-2)=5 (x+3)
e) 2.(x-6)=-3 (5+x)
f) x + x =1
2 4 2

g) x - x =5
2 4

Answer 1

a)6x-2x=28
4x=28
x=28
4
x=7

b)3x+6=15
3x=15-6
3x=9
x=9
3
x=3

c)2x-2-7=16
2x=16+2+7
2x=25
x=25
2

d)7x-14=5x+15
7x-5x=15+14
2x=29
x=29
2

e)2x-12=-15-3x
2x+3x=-15+12
5x=3
x=3
5
o resto eu n sei

Answer 2

a)6x-2x=28
4x=28
x=28/4
x=7
b)3x+6=15
3x=15-6
x=9/3
x=3
c)2x-2-7=16
2x=16+2+7
x=25/2
x=12,5
d)7x-14=5x+15
7x-5x=15+14
-2x=29
x=29/2
x=14,5
e)2x-12=15+3x
2x-3x=15+12
-x=27
x=27
f)x+x=1
2x=1
x=1/2
x=0,5
g)x-x=5
x=5.