ACT Preparation / Unit 9 ACT 0806 short lesson, about 20 seconds
Literal Equations
Captions available
The idea
A literal equation, such as a formula, is solved for one variable in terms of the others, using the same inverse operations.
In practice
Solving d = rt for t gives t = d/r. Solving A = P + Prt for r gives r = (A − P)/(Pt).
Where people slip
Treat every other letter as a fixed number while isolating the one you want.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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