book Maths Puzzle Numerical Ability

Please help me solve this: 7r-(2r+8)=32

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I need help quickly on these I have no idea how to work these. Thank you for your help.

Write an equation on the line that has slope = -(2/3) and passes through (5, -4)

Wr If one and one-half teams of men require one and one-half days to shovel one and one-half truckloads of sand, how long will it take one teams to shovel one truckload?