SOLUTION: Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class?

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Question 956930: Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
.6X+30=X
.6X-X=-30
-.4X=-30
X=-30/-.4
X=30/.4=75 CLASS SIZE.
75-30=45 GIRLS.
PROOF:
.6*75+30=75
45+30=75