exam Maths Puzzle Numerical Ability

(3x+5)/4=5

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exam Other Question

Subtract and write in simplest form:

12 10
---- - ----
Z Z

Is the answer:
2
---
Z^2

Thank you very much rewrite the equation so that y is a function of x. The equation: 1+7y=5x-2. Could you show your formula steps? Please and thank you.