In this video, we will be learning how to solve inequalities using addition or subtraction.
Subtract 7 from both sides
Graph the inequality
Let’s go over solving inequalities using addition or subtraction.
Solving this is similar to a regular equation except from the inequality sign instead of an equal sign.
Let’s solve for by subtracting from both sides of the inequality.
Our answer is
We can graph this by drawing a number line then encircle the number then draw a line to the left which represents the numbers less than .
Now, let’s take a look at subtraction.
To solve , let’s just add on both sides.
Now, let’s graph it by drawing a numbe line.
Let’s draw an open circle on and draw a line to the right to represent numbers greater than .
If we change the sign of into , then our answer would be .
Our graph will have a solid circle on instead of an open circle. Then the line is still going to the right to represent numbers greater than .