60%.\(x\) + 0,4.\(x\) + \(x\): 3 = 4
0,6\(x\) + 0,4\(x\) + \(\dfrac{1}{3}\)\(x\) = 4
(0,6 + 0,4 + \(\dfrac{1}{3}\)).\(x\) = 4
\(\dfrac{4}{3}\).\(x\) = 4
\(x\) = 4: \(\dfrac{4}{3}\)
\(x\) = 3
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\(60\%.x+0,4.x+x:3=4\)
\(0,6x+0,4x+\dfrac{1}{3}=4\)
\(\left(0,6+0,4+\dfrac{1}{3}\right)x=4\)
\(\dfrac{4}{3}.x=4\)
\(x=4:\dfrac{4}{3}\)
\(x=3\)