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 Algebra 1 A Bridge to Success

BI

Big Ideas Math Algebra 1 A Bridge to Success View details

Quiz

Continue to next subchapter

Exercise 1 Page 26

Gather all of the variable terms on one side of the equation and all of the constant terms on the other side.

x=-2

To solve an equation, we should first gather all of the variable terms on one side and all of the constant terms on the other, using the Properties of Equality.

x+9=7

LHS-9=RHS-9

x+9-9=7-9

Subtract terms

x=-2

We will check our solution by substituting this result back into the original equation and simplifying. If doing so results in an identity, our solution is correct. An identity is when both sides of the equation are exactly the same.

x+9=7

x= -2

-2+9? =7

Add terms

7=7

Since substituting x=-2 resulted in an identity, our solution is correct.

Subchapter links

Exercises