Question

pfv ajuda ai é pra hj​

Answer 1

Resposta:

Explicação passo-a-passo:

$x+7=3\\x=3-7\\x=-4$

$8-x=2+x\\8-2-x=x\\6-x=x\\-2x=-6\\\\x=\frac{-6}{-2}=3$

$17x=15x\\2x=0\\\\x=\frac{0}{2}=0$

$-x=3x+5\\-3x-x=5\\-4x=5\\\\x=\frac{5}{-4}=-12,5$

$100=4x\\4x=100\\\\x=\frac{100}{4}=25$