exam Maths Puzzle Numerical Ability

Solve the system by addition.
2x - 4y = 7
4x + 2y = 9

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exam Other Question

cash discounts: Ordinary Dating Methods

Finding Discount Dates: An invoice is dated January 18 and offers terms of 6/10, 4/20, 1/30, n/50. Find (a)the three final discount date this is a triangle. Given: side AB is congruent to CB, segment FD bisects side AB, and segement FE bisects CB. Prove:segment AD is congruent to segment CD.