Math Algebra Substitutions

Simplify the expression:
7(n-3)

• 7n + 21

• 7n - 21

• 7n - 7

• n - 21

Simplify the expression:
8(3v + 5)

• 24v - 40

• 32v + 40

• 24v + 40

• 24 + 40

Simplify the expression: 
12(x+y)

• 24xy

• 12x - 12y

• 12x + y

• 12x + 12y

Simplify the expression:
4(5s+4)

• 20s + 16

• 16s + 20

• 20s + 20

• 36s

If y=4,find the value of 3y+5

• 27

• 12

• 17

You are given the equation
2x + 3y = 6
Substitute the values (3, 0) into the equation. Which equation below shows a correct substitution? 2(​ (a)   )+3(​​ (b)   ) = 6

• 3

• 0

• 3x

• 0y

• 6

• 9

If x = 2, in the equation y = 3x - 5, what is the value of y?

Use substitution to find the solutions to their equations (Click the box, click the answer, then click the box again) 12 - a = 3, a =​ (a)   21 - b = 13, b = ​ (b)   14 - c = 8, c = ​ (c)  

• 9

• 8

• 6

• 3

Answer explanation

When using substitution you replace the given variable with the given numbers until you find the one that makes the equation true!

Tags

6.EE.5

6.EE.6

Mathematical Equivalence

ON

What does it mean to substitute?

• to remember

• to replace or to plug in

• to get rid of or to take away

• to connect the dots