Question 184758
A math class has 30 students . the number of boys in the class is 4 more than the number of girls.\ Use the system of linear equations to determine the number of girls in the class. 
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Let # of girls be "x".
Then # of boys is "x+4".
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Equation:
x + (x+4) = 30
2x + 4 = 30
2x = 26
x = 13 (# of girls is 13)
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Cheers,
Stan H.