exam Maths Puzzle Numerical Ability

Angles A and B are complementary.
Measure of angle A equals to 5x+8 and angle B equals to x-11. Find angle A and angle B

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exam Other Question

Hello,

How would I enter 6x + 5 - 7x + 10 - 4x + 7 and get a solution? Is it possible using a scientific calcualtor? Horriable at fractions any help would be greatly appreciated. It is a fraction with the exponet being the 2/3 and 1/3.

(25x^3) 2/3
(125xy^2) 1/3