<PRE><B>Question 653849</B>
Write an equation for each statement:
:
A classroom contains an equal number of boys and girls.
b = g
:
 If 8 girls leave, twice as many boys as girls remain.
b  = 2(g-8)
Replace g with b
b = 2(b-8)
b = 2b - 16
16 = 2b - b
b = 16 boys, then 16 girls originally
:
 What was the original number of students present? 32, obviously
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