Question 245041
The number of boys in ninth grade is 12 less than twice the number of girls. There are 51 students in ninth grade. How many are girls?
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Equations:
b + g = 51
b = 2g-12
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Substitute for "b" and solve for "g":
2g-12 + g = 51
3g = 63
g = 21 (# of girls)
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Cheers,
Stan H.