exam Maths Puzzle Numerical Ability

suppose that x represents a womans age now. express her age in five years

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exam Other Question

Solve each of the following systems by substitution.
McGraw Hill 6th edition, 8.3 # 20.
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8x-4y=16
y=2x-4 How many ways can a committe of 7 people be selected from a group of 15 people