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a. 2x+1 / 3 = 3x-2 / 5 (kali silang)
10x + 5 + 9x - 6 / 15
19x + 1 / 15
b. x+1 / 2x - x-1 / 3x (kali silang)
3x^2 + 3x - 2x^2 - 2x / 6x^2
x^2 + x / 6x^2