Question

me ajudem galera socorro por favor​

Answer 1

Resposta:

6) a) $6x+2x+x=180$

$9x=180$

$x=20$

b) $\left(3x-30\right)+\left(x+10\right)=180$

$4x-20=180$

$4x=200$

$x=50$

7) a) $x+15=90$

$x=75$

b) $x+60=90$

$x=30$