exam Maths Puzzle Numerical Ability

I am trying to find out the steps of how to get the answer to 2x + x + 1 = 2?

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exam Other Question

solve the following equation
sqrt x-s=1
How do I simplify the following question:

If Joan made x/y and Randy made x-1/y and Lisa made 2/3 less than Joan, how much did they make all together.