2.8(x+2)-3(1.2+2x)=4(0.5×3)-6.8
2.8x+5.6-3.6-6x=6-6.8
2.8x-6x=6-6.8-5.6+3.6
-3.2x=-2.8
x=0.875
2.8(x+2)-3(1.2+2x)=4(0.5×3)-6.8
2.8(x+2)-3(1.2+2x)=4(0.5×3)-6.8
等于幾,列等式
等于幾,列等式
數(shù)學(xué)人氣：242 ℃時間：2020-04-27 07:03:03
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