Question

Resolva as equações .

A) 5(2×+7)-1=4 (×-5)+9

B) 2(×-1)+3 (×+1)=4 (×+2)

C) 2(×+1)+5 (×-1)=7

D) 2(2×+3)+5 (×+1)=8-3 (×-1)

E) 13(2×-3)-5 (2-×)=5 (-3+6×)

Answer 1

Resposta:

Boa tarde.

Segue a resolução das questões:

a) 5(2x+7)-1=4(x-5)+9

10x+35-1-4x-20+9

10x-4x=-20+9+1-35

6x=-11-34

6x=-45

x=-45/6

x=-7,5

b) 2(x-1)+3(x+1)=4(x+2)

2x-2+3x+3=4x+8

2x+3x-4x=8-3+2

5x-4x=5+2

x=7

c) 2(x+1)+5(x-1)=7

2x+2+5x-5=7

2x+5x=7+5-2

7x=12-2

7x=10

x=10/7

d) 2(2x+3)+5(x+1)=8-3(x-1)

4x+6+5x+5=8-3x+3

4x+5x+3x=8+3-5-6

12x=11-11

12x=0

x=0/12

x=0

Espero ter ajudado!