已知9x+7y+3z=160,则x=_____,y=_____,z=_____.x:y:z=1:2:3
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![已知9x+7y+3z=160,则x=_____,y=_____,z=_____.x:y:z=1:2:3](/uploads/image/z/13423722-42-2.jpg?t=%E5%B7%B2%E7%9F%A59x%2B7y%2B3z%3D160%2C%E5%88%99x%3D_____%2Cy%3D_____%2Cz%3D_____.x%3Ay%3Az%3D1%3A2%3A3)
已知9x+7y+3z=160,则x=_____,y=_____,z=_____.x:y:z=1:2:3
已知9x+7y+3z=160,则x=_____,y=_____,z=_____.x:y:z=1:2:3
已知9x+7y+3z=160,则x=_____,y=_____,z=_____.x:y:z=1:2:3
y=2x
z=3x
代入式子中9x+7*2x+3*3x=160
解得x=5
所以y=2x=2*5=10
z=3x=3*5=15
已知9x+7y+3z=160,则x=5,y=10,z=15. x:y:z=1:2:3
x=5,y=10,z=15
x 5
y 10
z 15
y=2x;
z=3x;
9x+7*2x+3*3x=160;
x=5,y=10;z=15
X=a,Y=2a,Z=3a.原式改为:9a+14a+9a=160,32a=160,a=5 所以X=5 ,Y=10,Z=15
已知9x+7y+3z=160,则x=__5___,y=___10__,z=___15__. x:y:z=1:2:3