book Maths Puzzle Numerical Ability

3x + 18 + 3(x+2) = 6x + 54

Solve for x.

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book Other Question

Write the following expression using positive exponents and simplify when possible.

x^-5 A car moving at 50km/h skids 15m with locked brakes. How far will the car skid with locked brakes at 150km/h?