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 6

BI

Big Ideas Math: Modeling Real Life, Grade 6 View details

2. Solving Equations Using Addition or Subtraction

Continue to next subchapter

Exercise 51 Page 258

Use the Subtraction Property of Equality to eliminate the addition.

m=30

Practice makes perfect

To solve the equation, we have to isolate m on one side. First, let's simplify our equation. m+18+23=71 ⇒ m +41 = 71Now, using the Subtraction Property of Equality, we will subtract 41 from both sides of the equation. This will eliminate the addition and isolate m.

m +41 = 71

LHS-41=RHS-41

m+41-41=71-41

Subtract term

m=30

To check that this solution is correct, let's substitute m=30 into the original equation and simplify.

m + 18+23 = 71

m= 30

30 + 18+23 ? = 71

Add terms

71=71 ✓

Since the left-hand side and right-hand side are equal, m=30 is the correct solution.

Subchapter links

Try It p.252-254

Self-Assessment for Concepts & Skills p.254

Self-Assessment for Problem Solving p.255

Review & Refresh p.256

Concepts, Skills, & Problem Solving p.256-258