so 2x+12=5x-9 you want all of the unknowns on one side and all of the known values on the other or subtract 2x from both sides 12=3x-9 add 9 to both sides 21=3x divide both sides by 3 7=x
2 x + 12 = 5 x − 9 ∣ co mbin e l ik e t er m s 2 x − 5 x = − 9 − 12 ∣ s im pl i f y − 3 x = − 21 ∣ : − 3 x = 7
The solution to the equation 2 x + 12 = 5 x − 9 is x = 7 . This can be verified by substituting x back into the original equation. The steps to arrive at this solution include isolating x on one side of the equation.
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