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Answer:
x = 12
Step-by-step explanation:
20 + 1/3x = 2x
Transpose 2x and 20 then change their sign
1/3x - 2x = -20
Combine like terms
-5/3x = -20
Mutiply both sides by -5/3
(3/-5)-5/3x = -20(-3/-5)
x = 12
Checking:
20 + 1/3x = 2x
20 + 1/3(12) = 2(12)
20 + 12/3 = 24
20 + 4 = 24
24 = 24
TRUE