You can put this solution on YOUR website! 5X - 20 = 10 * X
5X - 20 = 10X
Subtract 5x from each side
-20 = 5X
Divide each side by 5
-4 = X
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Let's make sure it works...
20 less than five times a number (-20-20) is equal to the product of ten and that number (10 * -4)
-40 = -40
success!