(1)4X+7Y=144 (2)12X-8Y=24求X和Y
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(1)4X+7Y=144 (2)12X-8Y=24求X和Y
(1)4X+7Y=144 (2)12X-8Y=24
求X和Y
(1)4X+7Y=144 (2)12X-8Y=24求X和Y
4X+7Y=144 ①
12X-8Y=24②
①×8+②×7
32x+84x=1152+168
116x=1320
x=330/29
∴4×330/29+7y=144
y=408/29
即:方程组的解为x=330/29;y=408/29
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