book Maths Puzzle Numerical Ability

the direction says to "solve each equation.check your answer.if appropiate, write identity or no solution."

2 (4 - 2r) = -2(r +5)

could you please show the steps also

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book Other Question

Please help me determine an equation of the line through (-3,4) and perpendicular to the line with the equation 4x-2y=1. I came up with y=-2x+7.
Am I even close? This proble involves a function rule..
Input X 1 2 3 4 5 6
Output Y 3 2 1 0 -1 -2
We need to determine the function rule.

Another one..
Input X 1 2 3 4 5 6
Input y 1 3 5 7 9 11

Thanks!