Question 173476
lets call the number of children and adults, c and a respectively
:
c+a=52......eq 1---->a=52-c
c=3a........eq 2
:
take a's value from eq 1 and plug it into eq 2
:
c=3(52-c)
:
c=156-3c
:
4c=156
:
{{{highlight(c=39)}}} the number of children that attended the ball game.