exam Maths Puzzle Numerical Ability

I WANT TO LEARN PRE-ALGEBRA: HOW DO I SOLVE X=8

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exam Other Question

For moving purposes, the Hendersons bought 25 card board boxes for $97.50. There were two kinds of boxes; the large ones cost $ 7.50 per box, and the small ones cost $3 per box. HOw many boxes of each kind did they buy? Help please:

Divide--

p^2 - q^2/p+q divided by p-q/p+q