5(x - 3) = 7x 2 step 1 ⇒ 10(x - 3) = 7x step 2 ⇒ 10x - 30 = 7x step 3 ⇒ 3x - 30 = 0 step 4 ⇒ 3x = 30 step 5 ⇒ x = 10 identify the property of equality which yields step 4.

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212