You can put this solution on YOUR website! First simplify both sides of the = sign.
Now get all the x's on one side of the = sign. We can do this without breaking the rules of algebra by doing the opposite operation to whatever you are moving to both sides of the = sign.
Now move the numbers to the other side of the = sign within the rules of algebra.
To check yourself substitute the7 in for x in the original equation and simplify to see if both sides = when x=7. We're right!!!!