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50 = (2x + 3) x 5
50 = 10x + 15
10x + 15 = 50
10x = 35
x = 3,5 atau 3 1/2
50 = (2x + 3) x 5
50 = 10x + 15
50 - 15 = 10
35 = 10x
x = 3,5