Question

3) Resolva as equações:

a) 5(x + 2) – 13 = 6x – 2

b) 2(y + 2) = 100

c) 2a + 10 = – a – 26

d) 4(x + 3) – x = 24 + x

e) x – (2x – 1) = 23​

Answer 1

Explicação passo-a-passo:

a) 5(x + 2) – 13 = 6x – 2

5x+10-13=6x-2

5x-6x=-2-10

-x=-12 (-1)

x=12

b) 2(y + 2) = 100

2y+4=100

2y=100-4

2y=96

y=96/2

y=48

c) 2a + 10 = – a – 26

2a+a=-26-10

3a=-36

a=-36/3

a=-12

d) 4(x + 3) – x = 24 + x

4x+12-x=24+x

4x-x-x=24-12

4x-2x=12

2x=12

x=12/2

x=6

e) x – (2x – 1) = 23

x-2x+1=23

x-2x=23-1

-x=22 (-1)

x=-22