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Math · Foundational

Solving Equations

Discover what the equals sign really means by playing with balance scales. Then learn to undo operations, turn word problems into equations, rearrange formulas, crack puzzles with two unknowns using algebra and graphs, and solve inequalities whose answers are whole ranges.

8 lessons~50 min0/8 complete
1

The Balance

An equation is a scale that stays level.

  1. Balance ScalesWhat does “=” really mean?
  2. Undo ButtonsInverse operations, in reverse order
2

Equations in the Wild

Turning words into equations, and equations that misbehave.

  1. Words to EquationsTranslate stories into algebra
  2. Rearranging FormulasMaking any letter the subject
  3. Strange SolutionsNo solution, or infinitely many
3

Two Unknowns

Systems of equations, solved with balances.

  1. Two ScalesSubstitution: swap one thing for another
  2. Lines That CrossSolving systems by graphing
4

Inequalities

When the answer is a range.

  1. InequalitiesSolving for a range of answers

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