7x-(x-3)=4x-2
We need to solve first the brackets
7x-x+3=4x-2
Next, we need to put all the terms with x on one side and all the terms without x on the other side, remember is you change the side of a term the sign will be the opposite that's why 4x change to -4x on the other side
7x-x-4x=-2-5
then we sum of the term
2x=-7
the term with x the 2 is multiplying x so on the other side change to divide the seven
x=-7/2