exam Maths Puzzle Numerical Ability

Rewrite the given equation as a function of x:
-3x+4y=11

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exam Other Question

8x+2y=-10
4x+y=-5

This cannot be solved, as the 1st equation is the same as the 2nd multiplied. If you graph this, it will be the same line. No solution is possible. One third of a number is 2 more than one-sixth of the same number. What is the number?

Also:

Suppose Stephanie walks D mi at R mph in the same time that wally walks d mi at r mph. Give an equation relating D,R,d, and r.