exam Maths Puzzle Numerical Ability

i need help on grahing system of equations.

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exam Other Question

Please help I have no idea how to do this!

The difference between the selling price and the variable cost per unit for a given product is
called the contribution to profit for I understand simple absolute value, but I don't understand it when it is an equation. The problem is:
|x+2/5|=1/5

How do you figure it out, and then when you graph it on a num