Solving Addition and Subtraction Equations

Which equation and solution does the image represent?

• x - 2 = 3

  x = 3

• x + 2 = 5

  x = 7

• x + 2 = 5

  x = 3

• x + 4 = 10

  x = 3

After giving away 8 pieces of candy, Juan has 6 pieces left. Write an equation to represent, c, the number of candies Juan had in the beginning?

• 8 - c = 6

• 6 - c = 8

• c - 8 = 6

• c + 8 = 6

Which equation matches the image?

• x + 5 = 13

• x - 5 = -13

• x - 5 = 13

• x + 4 = 13

Martin is 7 years older than his sister. If Martin is 15 years old, write and solve an equation to find, x, his sister's age?

• 15 - x = 7

• 15 + 7 = x

• x + 7 = 15

• 7 - x = 15

j + 0 = 9

• j = 9

• j = -9

• j = 0

• j = 1

w + 5 = 4

• w = -9

• w = 9

• w = -1

• w = 1

What is the inverse operation of addition?

• Addition

• Subtraction

• Multipication

• Division

What is the inverse operation of subtraction?

• Addition

• Subtraction

• Multiplication

• Division

What is the main goal in solving equations?

• Isolate the coefficient

• Isolate the constant

• Isolate the variable

• Isolate the equals sign

y + 32 = 76

• 44

• 108