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Box each equation by its undo step

Exercise and reference answers

Items
  1. Item
    x + 9 = 8
    Category
    Add or subtract
  2. Item
    5x = 35
    Category
    Multiply or divide
  3. Item
    y - 4 = 11
    Category
    Add or subtract
  4. Item
    a + 7 = 2
    Category
    Add or subtract
  5. Item
    -6b = 18
    Category
    Multiply or divide
  6. Item
    c - 12 = 0
    Category
    Add or subtract
  7. Item
    2m = 14
    Category
    Multiply or divide
  8. Item
    n ÷ 3 = 6
    Category
    Multiply or divide
Categories
  1. Item
    Add or subtract
  2. Item
    Multiply or divide
Instructions
Tap an equation, then tap the box for the operation that frees the variable in one move.

Explanation

_Source: OpenStax Elementary Algebra, section 2.1 Solve Equations Using the Subtraction and Addition Properties of Equality_
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