exam Maths Puzzle Numerical Ability

sorry if i keep sending so many problems but i need help on some problems i dont get multi step equations so yeah here are the problems,8x-5=4x+4-2x;15-3y=y+13+y;3w-1-4w=4-2w

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exam Other Question

How do you simplify a rational problem like this: 2x^2+6x+4/4x^2-12x-16, whats the answer for this problem? please help me to solve this:
find three consecutive integers. the square of the largest one equals the sum of the squares of the other two.