A two-step equation hides the unknown behind two operations. To free
x, undo them — but undo them in reverse order. Take:
2x + 3 = 11
Here x was first multiplied by 2, then
3 was added. Peeling that back works outside-in: undo the
addition first (subtract 3), then undo the
multiplication (divide by 2). This is just a
one-step equation
done twice — and it mirrors
order of operations
run backwards.