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Maths Puzzle
Numerical Ability
four times a number decreased by twice the number is 100
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book Other Question
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?
Solve by the substitution method
x+y=4
x-y=5