解方程组:x/28+y/35+z/30=4.5①;x/35+y/28+z/30②;x+y+z=142③

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解方程组:x/28+y/35+z/30=4.5①;x/35+y/28+z/30②;x+y+z=142③解方程组:x/28+y/35+z/30=4.5①;x/35+y/28+z/30②;x+y+z=14

解方程组:x/28+y/35+z/30=4.5①;x/35+y/28+z/30②;x+y+z=142③
解方程组:x/28+y/35+z/30=4.5①;x/35+y/28+z/30②;x+y+z=142③

解方程组:x/28+y/35+z/30=4.5①;x/35+y/28+z/30②;x+y+z=142③
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