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I need help on this question If 3a + 2b = 7 and 2a + 2b = 9 , what is the value of ?
3a + 2b = 7---(1) 2a + 2b = 9---(2) From (1), a = (7-2b)/3---(3) Sub. (3) into (2), 2[(7-2b)/3]+2b = 9 the solve it
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