exam Maths Puzzle Numerical Ability

Please help me figure out this problem: 8-3(p-4)=2p Thank you! This is a problem that my teacher wrote out on the board.

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exam Other Question

The line

y=0.15x+0.79

represents an estimate of the average cost of gasoline for each year. The line
0.11-y= -0.85



estimates the price of gasoline in January of
1-(1+xy^-2)^-2 divided by 1+(1+xy^-2)^-2

Directions are to simplify. Thanks