Question

已知18分之3m-10x等于3分之m=5x与方程0.2分之x-0.3分之1.8-2x等于1的解相同求m的值?

Answer 1

(3m-10x)/18-m/3=5x

3m-10x-6m=90x

x=-0.03m

把x=-0.03m代入x/0.2-(1.8-2x)/0.3=1

-0.03m/0.3-(1.8+2*0.03m)/0.3=1

-0.1m-0.2m-6=1

m=-70/3