exam Maths Puzzle Numerical Ability

Factor completely.
x^2 + 3x - 28

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exam Other Question

Five years ago, my age was half of the age I will be in 8 years. How old I am now? Solve for X, Y, and Z in the following equation

c. 22X + 5Y + 7Z = 12

10X + 3Y + 2Z = 5

9X + 2Y + 12Z = 14