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Multiply both sides by 3. You will get
2x = 72 + 18x.
Move 18x from right side to the left side changing the sign
2x - 18x = 72.
Combine like terms in the left side
-16x = 72.
Divide both sides by -16
x = 72/(-16) = - 72/16 = -9/2.
ANSWER. x = -9/2.
Solved.