exam Maths Puzzle Numerical Ability

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please help me solve this equation: if 3x-1=11, what is the value of 2x+x?
Thank you all in advance!!!!!!
My question is off a worksheet that if called Solving problems involving inequalities. It is "Find the largest pair of consectutive integers whos sum is less than 85."
My work is:
x+x+2<85
2x<83