book Maths Puzzle Numerical Ability

How do I simp 7(2x+2)-9(-1+6x)

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book Other Question

Darrell has 2$ less than five times as much money as Bob. Mary has as much money as Darrell and Bob put together. If all three of them together have 80$, how many money does Mary have? simplify

sqrt of 4 divided by the difference of 3 and sqrt of 5