An equation is a balanced scale: whatever you do to one side, do to the other.
Simplify expressions, solve equations and inequalities, and crack systems of two equations —
one move at a time, with the reason for every move.
Method
Make a problem for me — pick what goes in it
Try
Your answer
Work it out on paper first, then type what you got.
The work
( ) Distribute
+ − Combine, or add / subtract both sides
× ÷ Multiply or divide
⇄ Flip, swap or plug in
Say it out loud
One move per line, nothing skipped. Stuck on the arithmetic inside a step? Work it on
+, −,
×, ÷ or
the Order Stack.