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6x=18
x=3
jadi nilai x aalah 3
(2x-1) + (x+3) +(3x-1) = 19
2x-1+x+3+3x-1 = 19
6x+1=19
6x = 19-1
6x = 18
x = 18/6
x = 3 cm
sdah yas.. capek nulisnya, pke Hp sih.. hehee.