exam Maths Puzzle Numerical Ability

Write a system of two equations in two unknowns. Solve the system by using the substitution method. � Bill and Sue together earn $76,433 per year. If Bill earns $15,000 less than twice Sue�s salary, then how much does each person earn per year? �

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exam Other Question

Simplify the following fraction.
2x^2+x-6 /2x+4
I did it this way but I am not sure if it is right.
(2x+x)(x-6)/2(x+4)= 2x^2-6/2+4= 2x^2-6/6= 2x^2
Could someone please tell me if that is right? Kindly solve this problem.
The measure of an angle is 20 less than the measure of its supplement. Find the measure of the angle, the measure of its supplement and the measure of its complement.