2x + 7 = x + 3
First, subtract x from both sides. / Your problem should look like:
Second, simplify 2x + 7 - x to x + 7. / Your problem should look like:
Third, subtract 7 from both sides. / Your problem should look like:
Fourth, subtract 3 - 7 to get -4. / Your problem should look like:

Answer:
x = -4