Question

simplifique
6.(x-2)=12
9+2.(5x-4)=21
10x+4.(3-2x)-6=8
3.(5+3x)+5.(-x-1)=22
2.(9x-4)-7+(¨6-5x).3=18

Answer 1

Resposta:

$6x - 12 = 12 \\ 6x = 12 + 12 \\ x = \frac{24}{6 } \\ x = 4 \\ \\ 9 + 10x - 8 = 21 \\ 10x + 1 = 21 \\ 10x = 21 - 1 \\ 10x = 20 \\ x = 2 \\ \\ 10x + 12 -8x - 6 = 8 \\ 2x + 6 = 8 \\ 2x = 8 - 6 \\ 2x = 2 \\ x = 1 \\ \\ 15 + 9x - 5x - 5 = 22 \\ 4x + 10 = 22 \\ 4x = 12 \\ x = 3 \\ \\ 18x - 8 - 7 + 18 - 15x = 18 \\ 18x - 15x - 15 + 18 = 18 \\ 3x + 3 = 18 \\ 3x = 18 - 3 \\ 3x = 15 \\ x = 5$