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the ratio of boys to girls in a classroom is 7:5 4 boys are added to the class the ratio is now 1:1 find the total number of girls in the cl
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the ratio of boys to girls in a classroom is 7:5 4 boys are added to the class the ratio is now 1:1 find the total number of girls in the class
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Mathematics
7 months
2021-08-10T23:25:03+00:00
2021-08-10T23:25:03+00:00 1 Answers
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Answer:
14
Step-by-step explanation:
7/5. = x/ x- 4 (the ratio to each other is the same)
cross multiply
7x-28 = 5x
simplified: -2x = -28
divide x and -28 by -2
x= 14
x= # of girls