book Maths Puzzle Numerical Ability

In the exercises 23 it said to solve the given linear equation and check your answer. will I must be doing everthing wrong for I cant get the right answer.
can you help me -4(2x+1)-(x-2)=-11

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book Other Question

sketch the graph of y=2sq.rt.of x. Give the domain and range.
thanks
what is and how i solve it please with a cherry on top!!!!

2x-3
_____ =4/7
4x-5


Rachel