Question

Gente me ajuda pfvvvv

Answer 1

a)

$x+40=90\\x=90-40\\x=50$

b)

$(x+30)+(x-10)=90\\x+30+x-10=90\\2x+20=90\\2x=90-20\\2x=70\\x=\frac{70}{2} \\x=35$

c)

$(5x+24)+(x+36)=180\\5x+24+x+36=180\\6x+60=180\\6x=180-60\\6x=120\\x=\frac{120}{6}\\x=20$