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Pearson Algebra 1 Common Core, 2011

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Pearson Algebra 1 Common Core, 2011 View details

2. Solving Two-Step Equations

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Exercise 69 Page 93

How can we isolate x on the left-hand side?

x=5

Practice makes perfect

To solve the equation, we have to isolate x on one side of the equation. By dividing both sides of the equation by -5, we can remove the coefficient from x.

-5x=-25

.LHS /(-5).=.RHS /(-5).

-5x/-5=-25/-5

- a/- b=a/b

x=25/5

Calculate quotient

x=5

To check that we have the correct solution, we can substitute x=5 into the original equation.

-5x=-25

x= 5

-5( 5)? =-25

Multiply

-25=-25

Since both sides are equal, we can conclude that x=5 is the correct solution.

Subchapter links

Lesson Check p.91

Practice and Problem-Solving Exercises p.91-93

Standardized Test Prep p.93

Mixed Review p.93