## Algebra 1: Common Core (15th Edition)

$x=4$
Part A $2x-1 = 7$ We should add 1 to both sides. $2x = 8$ We should divide both sides by 2. $x = 4$. 4 is the answer. Part B. We could also take another approach. We could subtract both sides by 7. $2x - 8 = 0$ Then we could subtract both sides by 2x. $-8 =-2x$ Then we would divide both sides by -2. $4 = x$. 4 is the answer. Part C The method in part A is clearly easier; there are fewer steps.