√b/a-x= √a
Square both sides:
When you square both sides you take away the
radical:
Multiply both sides by (a-x)
Cancel on the left. Distribute on the right
b = a² - a·x
Add a·x to both sides:
b + a·x = a²
Subtract b from both sides:
a·x = a² - b
Divide both sides by a:
Cancel the a's on the left
x =
Edwin