body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Big Ideas Math: Modeling Real Life, Grade 7

BI

Big Ideas Math: Modeling Real Life, Grade 7 View details

5. Solving Inequalities Using Addition or Subtraction

Continue to next subchapter

Exercise 4 Page 155

Use the Division Property of Equality to eliminate the multiplication.

x=9

Practice makes perfect

To solve the equation, we have to isolate x on one side. Using the Division Property of Equality, we will divide both sides of the equation by 4. This will eliminate the multiplication and isolate x.

4x = 36

.LHS /4.=.RHS /4.

4x/4 = 36/4

Calculate quotient

x = 9

To check that this solution is correct, let's substitute x=9 into the original equation and simplify.

4x = 36

x= 9

4* 9 ? = 36

Multiply

36 = 36 ✓

Since the left-hand side and right-hand side are equal, x=9 is the correct solution.

Subchapter links

Try It p.152-153

Self-Assessment for Concept & Skills p.153

Self-Assessment for Problem Solving p.154

Review & Refresh p.155

Concept, Skills, & Problem Solving p.155-156