Question

Resolva as equações

A) ×-7=7×-43
B) 3×=×+10
C) 9a+3a=-1-3
D) -4t+12=2t+8
E) 5b-5+b=9+b
F) 3(b+10)=t+20
G) y/2+y/4+y/2=4.

Me ajudem por favor

Answer 1

Explicação passo-a-passo:

Resolva as equações

A)

x-7=7x-43

x-7x= - 43+7

-6x= -36 . (-1)

6x=36

x=36/6

x=6

B)

3×=×+10

3x-x=10

2x=10

x=10/2

x=5

C)

9a+3a=-1-3

12a= -4

a= -4/12 ÷(4

a= - 1/3

D)

-4t+12=2t+8

-4t-2t=8-12

-6t= - 4 .(-1)

6t=4

t=4/6 ÷(2)

t= 2/3

E)

5b-5+b=9+b

5b+b-b=9+5

5b=14

b=14/5

F)

3(b+10)=b+20

3b+30=b+20

3b-b=20-30

2b= -10

b= -10/2

b= - 5

G)

y/2+y/4+y/2=4.

8y+4y+8y=4

20y=4

y=4/20 ÷ (-4)

y=1/5