Question

6. Resolva estas equações:
a) 3 - 2(x + 3) = x - 18

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

c) 5(5 - 1) = x-612

d) 50 + (3x - 4) = 2(3x - 4) + 26

e) 3 + 4x = 15-(-x-6)

f) 2(2x - 4) = 5-( +4​

Answer 1

Resposta:

a) 3 - 2(x + 3) = x - 18

3-2x+6=x-18

-2x-x= -18-3-6

-3x= -27.(-1)

3x = 27

x= 27/3

x = 9

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

3x-12= -1-3x+1

3x+3x= -1+1+12

6x = 12

x = 12/6

x = 2

c) 5(5 - 1) = x-612

25-5 = x-612

-x = -612-25+5

-x = -632.(-1)

x = 632

d) 50 + (3x - 4) = 2(3x - 4) + 26

50+3x-4 = 6x-4+26

3x-6x = -4+26-50+4

-3x = -24.(-1)

3x = 24

x = 24/3

x = 8

e) 3 + 4x = 15-(-x-6)

3+4x = 15+x+6

4x-x = 15+6-3

3x = 18

x = 18/3

x = 6

f) 2(2x - 4) = 5-( +4​)

4x-8= 5-4

4x = 5-4+8

4x = 9

x = 9/4

Explicação passo-a-passo: