Accompanied 61384

Sixty children from the school accompanied them to celebrate the village's founding. Forty children got colorful waving with the flag of the village. Thirty children got waved with the coat of arms of the village. How many children received both types of lubricants?

Correct answer:

x =  10

Step-by-step explanation:

n=60 A=40 B=30   x = A  B  n = A+Bx  x=A+Bn=40+3060=10



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