exam Maths Puzzle Numerical Ability

The length of a rectangle is 4 times the width. The perimeter is 90 cm. Find the width and length.

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exam Other Question

complete the ordered pair solution for the given equation
3x-2y=10 (2,_),(-2,_)
3x2+10x+5=0
I need this to be simplified as much as possible. Thank You.