exam Maths Puzzle Numerical Ability

solve (x+4)^2=25

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exam Other Question

I have to find the slope and y- intercept of the line for these three but i dont get how
4x+2y=32 i tried to work this out here
-4 -4
2y=-4x-32
y-2x=16
the next is 9x+3y=-81
2x-5y=10 Can you help me remember how to solve the following inequality:

14 _> t+20

The line should be under the greater than sign.