exam Maths Puzzle Numerical Ability

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Solve the system of equations using the Addition method.

2a + 3b = -1
3a + 5b = -2

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exam Other Question

1/(2*x-6)+2/(3*x-9)=7/(x^2-3*x)

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