exam Maths Puzzle Numerical Ability

Find the Fahrenheit temperature of hot coffee at 75oC by solving the equation 75 =5/9(f - 32)for F

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exam Other Question

3r - 3
------ where r = -10
11

I think you do like this....

3(-10) - 3 = -30 - 3 = 33 = 3
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11 11 11

Would the solution I provided be correct? One of two supplementary angles is 4 degree more than one-third of the other angle. find the measure of each angle.