已知a:2=b:3=c:4,且2a-b+c=10,则a+2b-3c的值为RT

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已知a:2=b:3=c:4,且2a-b+c=10,则a+2b-3c的值为RT已知a:2=b:3=c:4,且2a-b+c=10,则a+2b-3c的值为RT已知a:2=b:3=c:4,且2a-b+c=10

已知a:2=b:3=c:4,且2a-b+c=10,则a+2b-3c的值为RT
已知a:2=b:3=c:4,且2a-b+c=10,则a+2b-3c的值为
RT

已知a:2=b:3=c:4,且2a-b+c=10,则a+2b-3c的值为RT
设a:2 = b:3 = c:4 =x,则a = 2x,b = 3x,c = 4x.
则 2a - b + c = 4x - 3x + 4x = 5x =10,得出 x = 2.
则a = 4,b = 6 ,c = 8.
则a+2b-3c = -8