exam Maths Puzzle Numerical Ability

21 solve for x:2x/5=12-3x/2

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exam Other Question

Please help me figure this out - step-by-step.

4y^-1/2 = 16

Thanks. The Randolphs used 12 more gal of fuel oil in October
than in September and twice as much oil in November as in September. If they
used 132 gal for the 3 months, how much was used during each month?