Answer:
10
Step-by-step explanation:
8+5+15+12+10= 50 / 5 = 10
20
If the ratio of boys is 9 there are 90 boys. If 9=90 then 1= 10. 10 x 2 = 20
I hope this helps :0)
2(4 + X)
2*4 + 2*X
8+2X
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