exam Maths Puzzle Numerical Ability

How do you solve:

3A+2F=240
2A+1F=140
1.5A+.5F=100

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exam Other Question

y=(x-3)(x-5)(x-a). Determine the value of a. Maximize the objective function C = 4x + 5y with the constraints x + y <- 5, x + 2y <- 6, x >- 0, y >- 0

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