Exercise 61 Page 206

Inequalities can be solved in the same way as equations, by performing inverse operations on both sides until the variable is isolated. The only difference is that when we divide or multiply by a negative number, we must reverse the inequality sign.

7+y ≤ 3

SubIneq

LHS-7≤RHS-7

y≤ -4

The above tells us that all values less than or equal to - 4 satisfy the inequality. Let's graph the solution set on a number line. Notice that y can be - 4, which we show with a closed circle on the number line.