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Isolate a variableTechnique

Technique

Isolate a variable

Undo each operation, in reverse, on both sides

3 min 3 steps

Every equation is a record of what happened to x. I know records; I spent years trying to get mine erased.

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The first step is free. A free account opens the rest.

Calls on

Inverse operations keep the balanceFactKeep an equation true while you take it apart

Used by

Solve linear equations for a targetTacticRead the target first, then stop when it stands alone
Evaluate, invert, and transformTacticFind the missing end, then let the slope carry changes
Rearrange a literal equationTacticSolve for one letter as if the rest were numbers
Solve a nonlinear equationTacticLet the form pick the method, then check every root
Percent change, chains, and reverseTacticMultiply forward, divide back, never add percents
Probability from tables and conditionsTacticShrink the total to the condition, then count
Area and volume, forward and in reverseTacticWrite the formula, then solve for whatever's missing