exam Maths Puzzle Numerical Ability

x + 2y – z = 6
2x - y + 3 = 13
3x – 2y +3z = 16
Solve each system of equations algebraically using the method of substitution or the method of elimination. I

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exam Other Question
Solve each of the following quadratic equations by completing the square.
x^2-6x-3=0 Find the GCF for 85, 136, and 170 show the factorizations