Question

resolva as equaçoes

A)5b + 8 =3b -12
B)7a + 3a -7 = 8a - 13
C)3x + 3x + x = 8 - 27 + 2x
D)1/2x + 1/2x = 1
E)5/2x + 3/5 = 5

Answer 1

A) 5b-3b= -12-8

2b=-20

b=10

B) 7a+3a-8a=-13+7

2a=6

a=3

C)3x+3x+x-2x=8-27

5x=19

x=3,8

D)2/2x=1

2x=2

x=1

E)5/2x=5-3/5

5/2x=22/5

25x=44

x=1,76

Answer 2

A) 5b-3b= -8-12
2b= -20
b= -20÷2
b= -10

B) 7a+3a-8a= 7-13
10a-8a= 7-13
2a= -6
a= -6÷2
a= -3

C) 3x+3x+x-2x= 8-27
5x = -19
x= -19/5