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

Cumulative Practice

Exercise 3 Page 320

Substitute each value one at a time into the equation to verify if it is true or false.

H

We want to verify if any of the given values are solutions of the equation. We will replace the variable with each option and check if the equation is true.

x	11 - 3x = - 7	Simplify	True or False?
- 6	11 - 3( - 6) ? = - 7	29 ≠ - 7	False
- 4/3	11 - 3( - 4/3) ? = - 7	15 ≠ - 7	False
6	11 - 3( 6) ? = - 7	- 7 = - 7	True
54	11 - 3( 54) ? = - 7	- 151 ≠ - 7	False

The equation is true when x=6. This corresponds to option H.

Subchapter links

Exercises