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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

4. Rewriting Equations and Formulas

Finish the assignment

Continue to next subchapter

Exercise 1 Page 26

Apply inverse operations to isolate y.

y=2+1/5x

Practice makes perfect

To solve the given literal equation for y, we will use the Properties of Equality to apply inverse operations on the equation. Remember, only like terms can be combined.

5y-x=10

LHS+x=RHS+x

5y-x+x=10+x

Add terms

5y=10+x

.LHS /5.=.RHS /5.

5y/5=10+x/5

Calculate quotient

y=10+x/5

▼

Simplify right-hand side

Write as a sum of fractions

y=10/5+x/5

Calculate quotient

y=2+x/5

a/b=1/b* a

y=2+1/5x

Subchapter links

Try It p.26-27

Self-Assessment for Concepts & Skills p.27

Self-Assessment for Problem Solving p.28

Review & Refresh p.29

Concepts, Skills, & Problem Solving p.29-30