book Maths Puzzle Numerical Ability

what is the answer to y=3x+2 for the input-output table?

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book Other Question

x + y = -6
11x - y = 42

Many solutions or no solutions? Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 � hours. How quickly can all three fill the pool together