Forming an Equation (Writing an Equation):
Writing information presented in words as a mathematical sentence with an equality sign, operation symbols, numbers, and/or variables.
Determine an equation that can be formed based on a description.
Choose each answer from the menus
a) Sally earns $2 more per hour than Rosie. Let s = Sally's earnings, and r = Rosie's earnings.
s + 2 = r
r + 2 = s
2r = s
2s = r
b) The perimeter of a square is 39. Let s = the side length of the square
s^2 = 39
s = 39
4s = 39
4 = 39s