Fran solved the equation 42 = x + 23. Although her final answer was correct, she could have found it in a simpler way. Which sen
tence best explains why? 23 should be added to the left side and 42 added to the right side. 23 should have been subtracted from, not added to, both sides of the equation. 42 should be subtracted from both sides. The variable must be moved to the left side of the equation.
