exam Maths Puzzle Numerical Ability

solve this inequality
y-12>-15

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exam Other Question

Change the equation -2x + 8y =4 to slope intercept form.
Here are the steps I have preformed....
8y = 4 + 2y
y = 1/2 + 1/4
Is this right? When the polynomial 3x^2-2x+5 is subracted from product of 2x-5 and 3x+2, the answer is ax^2+bx+c. Find the sum of a+b+c.