用方程解答:设丙身上有x元,
6x+180=(5x+30)×1.5,
6x+180=7.5x+45,
6x+180-45=7.5x+45-45,
6x+135-6x=7.5x-6x,
135=1.5x,
135÷1.5=1.5x÷1.5,
x=90,
用方程解答:设丙身上有x元,
6x+180=(5x+30)×1.5,
6x+180=7.5x+45,
6x+180-45=7.5x+45-45,
6x+135-6x=7.5x-6x,
135=1.5x,
135÷1.5=1.5x÷1.5,
x=90,