exam Maths Puzzle Numerical Ability

Solve the folling 2 x 2 systems using substitutions

y=3x -7
2x + 5y =16

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exam Other Question

saquare root of 144 + 3[8=792-3)]= The length of a rectangle is 2 centimeters less than three times its width.If the area is 40 square centimeters,find the length and width.