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- 2a + 5a - 3b + 3b + 4 - 2 = 3a + 2
2.a. jadinya (10p - 8) - (8p - 10)=?
10p - 8 - 8p + 10 = 10p - 8p - 8 + 10 = 2p+2
b. jadinya 8y(5x - 9z) - 5x(8y -9z)=? yang b kurang tau ^^-