Exercise 30 Page 190

We can solve inequalities in almost the same way as equations. The only difference is that we need to remember to flip the inequality sign when multiplying or dividing by a negative value. For this exercise, distribute -5 on the right-hand side and simplify the terms to isolate r.

-5r+6≤-5(r+2)

Distr

Distribute -5

-5r+6≤-5r-10

AddIneq

LHS+5r≤RHS+5r

6≰-10

Since this expression is always false, the given inequality has no solution.