Question

$x + y = 90 \: \: \: \: y = x \div 2 \: \: \: \: \: \: \: \: \: \: \:$
afla x si y.


VA ROG HELP​

Answer 1

X+y=90
Y=x:2 => x+(x:2)=90
2x+x=180
3x=180
X=60
Y=90-60=30

Answer 2

x + y = 90

y = x/2 => x = 2y

Inlocuim

2y + y = 90

3y = 90

y = 30

x = 60