Question

2) Resolva as equações:pfv ajuda!｡◕‿◕｡

a) 7(x - 5) = 3(x + 1)
b) 3(x - 2) = 4(-x + 3)
c) 2(x + 1) - (x - 1) = 0
d) 5(x + 1)-3(x+2) = 0​

Answer 1

Resposta:

a) 19/2

b) 18/7

c) -3

d) 1/2

Explicação passo-a-passo:

a) 7(x-5) = 3(x+1)

7x-35 = 3x+3

7x-3x = 3+35

4x = 38

x = 38/4

x = 19/2

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

3x-6 = -4x+12

3x+4x = 12+6

7x = 18

x = 18/7

c) 2(x+1)-(x-1) = 0

2x+2-x+1 = 0

2x-x = 0-2-1

x = -3

d) 5(x+1)-3(x+2) = 0

5x+5-3x-6 = 0

5x-3x = 0-5+6

2x = 1

x = 1/2