10x+6*(380-7x)/8 =380 咋算,

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10x+6*(380-7x)/8=380咋算,10x+6*(380-7x)/8=380咋算,10x+6*(380-7x)/8=380咋算,10x+6*(380-7x)/8=38080x+2280-42

10x+6*(380-7x)/8 =380 咋算,
10x+6*(380-7x)/8 =380 咋算,

10x+6*(380-7x)/8 =380 咋算,
10x+6*(380-7x)/8 =380
80x+2280-42x=3040
80x-42x=3040-2280
38x=760
x=760/38
x=20