Well first you simplify the right side. You just multiply the numbers together. You could easily use a calculator for this. Then divide both sides by the coefficient in front of x. When you do this the coefficient in front of x becomes 1 because any number divided by itself is 1. On the right when you divide by a fraction it is the same as multiplying by the reciprocal (flipped version) of the fraction. The 14 multiplies with the 4 because they are both in the numerator while the denominator stays unchanged.