Addition and Subtraction with Unknowns

Solve for x.
x + 5 = 23

• 28
• 18
• 23
• 20

Solve for c. 
14 = c - 7

• 7
• 14
• 21
• 28

Solve for y. 
y - 35 = 50

• 25
• 15
• 85
• 35

Solve for m.
16 = m + 4 

• 20
• 12
• 16
• 4

Solve for z. 
12 = y + 6

• 18
• 6
• 4
• 20

Solve for s. 
24 = s - 8

• 32
• 16
• 8
• 24

Which equation represents the question?
John is 12 years old. This is 4 years older than his brother Mike. How old is Mike?

• m + 4 = 12
• m - 12 = 4
• 12 + m = 4
• 12 - m = 4

Which question represents the equation?
Rolando's score on his math test is 15 points less than Kobe. Rolando's score is 70 points. What was Kobe's score?

• k - 15 = 70
• k + 15 = 70
• 70 - k = 15

What is the first step to solve this equation?
y + 5 = 12

• Subtract 5 from both sides
• Subtract 5 from one side
• Add 5 from both sides
• Add 5 to one side and subtract 5 from the other

What is the first step to solve this equation?
19 = x - 5

• Subtract 5 from both sides
• Subtract 5 from one side and add 5 to the other
• Add 5 to both sides
• Subtract 5 from one side