book Maths Puzzle Numerical Ability

can you find the anwser to this h/3=-2

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book Other Question

1/4x + 3/5y = 5
3/8x + 4/5y = 7 Bob sold hammers and wrenches at a flea market. He sold 4 times as many hammers as wrenches. The total sales equaled $609.00. If the hammers sold for $3.00 apiece and the wrenches for $2.50 each how many hammers and wrenches did he sell?