Question

resolva as equações
a) 7x=24-5x
b) 10x-11=12x+21
c) 4x-4=0
d)3(x-2)-2(x+3)=8

Answer 1

a) 7x=24-5x
7x+5x=24
12x=24
x=24/12
X=2

b) 10x-11=12x+21
10x-12x=21+11
-2x=32 (-1)
2x=-32
x=-32/2
X=-16

c) 4x-4=0
4x=0+4
4x=4
x=4/4
X=1

d) 3(x-2)-2(x+3)=8
3x-6-2x-6=8
3x-2x=8+12
x=8+12
X=20

Answer 2

a) 7x=24-5x

7x+5x=24

12x=24

x=24:12

x=2

b) 10x-11=12x+21

10x-12x=21+11

-2x=32 .(-1)

2x=32

x=32:2

x=16

c) 4x-4=0

4x=4

x=4:4

x=1

d)3(x-2)-2(x+3)=8

3x-6-2x-6=8

3x-2x=8+6+6

x=20