整式的加减问题已知x+2y+3z=10.4x+3y+2z=5.求x+y+z的值

问题描述:

整式的加减问题
已知x+2y+3z=10.4x+3y+2z=5.求x+y+z的值

15和3

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我正在解

∵x+2y+3z=10 4x+3y+2z=5
∴(x+2y+3z)+(4x+3y+2z)=10+5
5x+5y+5z=15
∵求x+y+z
∴x+y+z=15/5
x+y+z=3