In the equation x + 7 = 12 7 is being added to the variable x. How should you show your work to isolate the variable and solve the equation?

Subtract 7 from both sides. The solution is x = 5.

Add 7 to both sides. The solution is x = 19.

Multiply both sides by 7. The solution is x = 84.

What is the difference between an expression and an equation?

Expressions do not have an equal sign and equations do have an equal sign

Expressions have an equal sign and equations do not have an equal sign

Expressions do not have variables and equations have variables

2 (n + 5) = -2 The first step in solving the following equation is ____________

distribute 2 to all terms in the parenthesis

Solve: − 3 x − 10 = 32 -3x-10=32 − 3 x − 1 0 = 3 2

x = − 7.3 x=-7.3 x = − 7 . 3

Simplify: 1 2 ( 12 k − 6 ) \frac{1}{2}\left(12k-6\right) 2 1 ( 1 2 k − 6 )

24 k − 12 24k-12 2 4 k − 1 2

Combine like terms and Solving Equations

Authored by Rudy Duran

Mathematics

9th Grade

CCSS covered

Used 1+ times

Combine like terms and Solving Equations

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MULTIPLE CHOICE QUESTION

15 mins • 1 pt

7x = 3x + 24

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Simplify the following expression:
-8(5b + 2) - 7(b - 5)

-33b + 19

-47b² + 21

33b - 19

-47b - 19

-8y = -3y -15

-3

-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

7w + 5 = 3w - 15

-2

-5

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve:
2(4x - 3) - 8 = 4 + 2x

x = 5/3

x = 3

x = 1

x = 2

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve:
5y + 34 = -2(-7y + 1)

y = -4

y = 9

y = 4

y = 36/19

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve the equation:
12x - 15 = 3(2x + 3)

x = 4

x = -4

x = 2

x = -2

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