exam Maths Puzzle Numerical Ability

please help me solve this equation: if 3x-1=11, what is the value of 2x+x?
Thank you all in advance!!!!!!

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exam Other Question

John can complete a paper route in 20 minutes. Steve can complete the same route in 30 minutes. How long will it take to complete the route if they worked together? find the equation of a line for this points (-1,3) and (3,-4)