exam Maths Puzzle Numerical Ability

How do you solve |2x + 6| - 4 = 20, whats the answer?

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exam Other Question

A rental car costs $25 plus a fixed charge per mile driven. The total charge for 320 miles of use was $89. Write an equation for the cost, C(in dollars), in terms of the miles driven ,x. Solve the following:

Find the slope of the line passing through the points (3, 4) and (3, -4).