exam Maths Puzzle Numerical Ability

If y varies directly as x and y=14 when x=8. Find x when y=21.

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exam Other Question

The quotient when 3 more than a number is divided 3 less than that same number. please help solve this three i can kinda have an idea but i need some guidance please help me. thank you:
x=2y+2,

4 1/2 Z =6

and

2x-3=5