Question

1 resolva as equaçoes abaixo

A) 2X-4=8

B) 5a+5=20

C) m+8=10

D) 10+8=50

E) x+8+3-24

F) y-12=8

G) 3k-2=25

H) 3x+8-x=10

i) 3a-12+a=12

Answer 1

a) 2X-4=8 

8 = 2x - 4
8+4 = 2x
12 = 2x
12/2 = x
x = 6 

B) 5a+5=20

20 = 5a + 5
20 - 5 = 5a
15 = 5a
15/5 = a
3 = a

C) m+8=10

10 = 8 + m
10 - 8 = m
2 = m

D) 10+8=50

?

E) x+8+3-24

?

F) y-12=8

y - 12 = 8
y = 8 +12
y = 20

G) 3k-2=25

3k - 2 = 25
3k = 25 +2
3k = 27
k = 27/3 
k= 9 

H) 3x+8-x=10

3x + 8 - x = 10
3x -x = 10 -8 
2x = 2
x = 1

i) 3a-12+a=12

3a - 12 +a = 12
3a +a = 12 +12
4a = 24
a = 24/4
a = 6