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Sagot :
Answer:
*i think* 10 boys and 30 girls
Step-by-step explanation:
this is because there are already 10 means, and if you multiply 10 by 3, you get 30
10+30=40
lmk if you have questions!
but if you want the equations then
b + b X 3=40
i think this is what your teacher means
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