Let x be the number.
2x is "twice the number"
2x - 2 is "twice the number decreased by two"
2x - 2 = 50 ("result is 50")
Now we just need to solve for x (that means to get x all by itself on one side of the equation):
Add 2 to both sides (the equation will hold true as long as you do the same (valid) operation to both sides):
2x - 2 + 2 = 50 + 2
2x = 52
Divide both sides by 2:
2x/2 = 52/2
x = 26
Ans: x = 26
Check: 2*26 - 2 = 52 - 2 = 50 (ok)
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Answers & Comments
Let x be the number.
2x is "twice the number"
2x - 2 is "twice the number decreased by two"
2x - 2 = 50 ("result is 50")
Now we just need to solve for x (that means to get x all by itself on one side of the equation):
Add 2 to both sides (the equation will hold true as long as you do the same (valid) operation to both sides):
2x - 2 + 2 = 50 + 2
2x = 52
Divide both sides by 2:
2x/2 = 52/2
x = 26
Ans: x = 26
Check: 2*26 - 2 = 52 - 2 = 50 (ok)