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A two-step equation with a variable that equals 23 could be (2x + 5 = 23). To solve for (x), first subtract 5 from both sides to get (2x = 18), and then divide by 2 to find (x = 9). Thus, the solution satisfies the original equation.
There are a lot of two step equations that could give you 18 like: 48x - 250= 614 15x - 17= 253 31x + 28= 586 6x + 59 = 167
From C2H5.OH: One and two sevenths
If 2x - 13 = 5 then 2x = 5 + 13 (we have in effect added 13 to both sides of the equation in this step) 2x = 18 x = 9.
By taking away, from the left side, anything that isn't "x". In this case, subtract 18 from both sides.