Question

c)3.(x+2)+5=x+12

d)x+4.(x-1)=9-2.(x+3)​

Answer 1

Resposta:

C)

3(x + 2) + 5 = x + 12

3x + 6 + 5 = x + 12

3x + 11 = x + 12

3x - x = 12 - 11

2x = 1

x = 1/2

x = 0,5

D)

x + 4(x - 1) = 9 - 2(x + 3)

x + 4x - 4 = 9 - 2x - 6

5x - 4 = 3 - 2x

5x + 2x = 3 + 4

7x = 7

x = 7/7

x = 1

Answer 2

Resposta:

c) 3.2x+5=x+12

6x+5=12x

11x=12x

d)4x.x-1=7.x+3

4x²-1=10.x

9x²=10x