Exercise 21 Page 211

An absolute value measures an expression's distance from a midpoint on a number line. For this exercise, we need to isolate the absolute value before we can find this distance.

-2|7d|=14

DivEqn

.LHS /-2.=.RHS /-2.

|7d|=-7

Since distance cannot be negative, the absolute value of a number cannot be negative. |7d|= -7 An absolute value cannot be equal to -7, so this equation has no solution.