Question

Triangle + triangle + square = 23
Triangle x square = 60
Triangle?
Square?

Answer 1

2 triangle+square=23
square=60/triangle

2 triangle+60/triangle=23

2 triangle^2+60=23 triangle

2 triangle^2-23 triangle+60=0

solving quadratic equation we get

triangle=15/2 , 4
15/2 is not possible so triangle=4
square=15