Solving Addition and Subtraction Equations

35 = y - 3

• -38

• -4

• 32

• 38

x + 4 = -3

• -1

• 4

• -7

• 8

Solve the equation & check your answer.
a - 6.2 = 7.18

• a = 0.98

• a = 13.38

• a = 7.80

• a = 0.780

Solve the equation & check your answer.
n + 4.09 = 6.38

• n = 10.47

• n = 9.47

• n = 2.29

• n = 1.29

A number increased by 27 equals 65. What is the number?

Write an equation for the model above.

• x + 3 = -9

• x - 3 = 9

• 3x + 1 = 9

• 3x - 1 = 9

Larry has 57 stand arrows. He gives some to his friends, now he only has 42 left. How many arrows did he give away?

Zoe bought some amount of oranges to put in her family smoothie. On the way home she dropped 17 of the oranges. When she got home, she only had 11 oranges. How many oranges did she originally buy?

To check your solution. You do what first?

• Isolate the variable

• Opposite

• Substitute the variable with the answer

• Use the "Golden Rule"

Layla had a number of Pokémon cards. She let her friend borrow 12 of them. She let her brother borrow 3 more. She now has 78 cards. How many Pokémon cards does she own?