Question 1012744
Adults: x
Students: y
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x+y = 23 and therefore the adults are 23-y, so
x = 23-y (if you want to express it algebraically, "subtract y, both sides)
7.25x+5.50y = 137 Let's substitute for x
7.25(23-y)+5.50y = 137 Multiply on left to eliminate parenthesis:
166.75-7.25y+5.50y = 137 Add/subtract y on left and subtract 166.75 on both sides:
-1.75y = -29.75 Divide both sides by -1.75 (and remember that -/- = +)
y = 17 This is how many students went. And we said that:
x= 23-y
x= 23-17
x= 6 adults also went
J