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Home > CC2 > Chapter 7 > Lesson 7.2.2 > Problem 7-115

7-115.
  1. For each equation below, solve for x. Sometimes the easiest strategy is to use mental math. Homework Help ✎

    1. xpic = 1pic

    2. 5.2 + x = 10.95

    3. 2x − 3.25 = 7.15

    4. pic = pic

x = 5.75

x = 5.2
Be sure to know how to get this answer using mental math. Recognize that 3.25 + 7.15 equals an even decimal, 10.4.

8(2) = 16
What must x be?