exam
Maths Puzzle
Numerical Ability
7. 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. If
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exam Other Question
A chemist has 300 grams of 20% hydrochloric acid solution. He wishes to drain some off and replace it with an 80% solution so as to obtain a 25% solution. How many grams must be drain and replace it with 80% solution.
Find all the numbers for which the rational expression is undefined:
q^3-8a/q^2-64