book Maths Puzzle Numerical Ability

how do you solve this problem?
5-3(x+1)=5

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book Other Question

How much water must be added to 180 grams of a solution that is 35% acetic acid to produce a solution that is 10% acetic acid? The sum of two integers is greater than 12. One integer is ten less than twice the other. What are the least values of the integers?