book Maths Puzzle Numerical Ability

how would I factor the equation (c + 3)^2 - 49

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book Other Question

please help solve this
3x=wyz

solve for x, w, and y
please explain so i can try to do others without help, thank you very much Eve has two more marbles than Solene.
Solene has twice as many marbles as Steve.
Steve has 7 less marbles than Eve.
How many marbles do they have between them?</PRE>