Question

resolva:
2x-10+7x+10=180

2x+5+x+7=18

3(x+1)+2(2x-3)=5(x-1)+8

3(x+3)-5=22​

Answer 1

$2x - 10 + 7x + 10 = 180 \\ 2x + 7x = 180 \\ 9x = 180 \\ x = 20$

$2x + 5 + x + 7 = 18 \\ 3x + 12 = 18 \\ 3x = 18 - 12 \\ 3x = 6 \\ x = 2$

$3(x + 1) + 2(2x - 3) = 5(x + 1) + 8 \\ 3x + 3 + 4x - 6 = 5x + 5 + 8 \\ 7x - 3 = 5x + 13 \\ 7x - 5x = 13 + 3 \\ 2x = 16 \\ x = 8$

$3(x + 3) - 5 = 22 \\ 3x + 9 - 5 = 22 \\ 3x + 4 = 22 \\ 3x = 22 - 4 \\ 3x = 18 \\ x = 6$

Espero ter ajudado!