exam Maths Puzzle Numerical Ability

Solve the equation.

7(y + -7) = 9y -49

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exam Other Question

The area of a rectangle of length x is given by 3x2 + 5x. Find the width of the rectangle (This requires knowledge of the formula for area of a rectangle)??? The question is:

Solve the system of linear equations using substitution method
x+3y=7
2x-3y=8