有两根同样长的铁丝,第一根用去6.5米,第二根用去0.9米,剩下的铁丝,第二根的长是第一根的3倍,两根铁丝原来长多少米?-K/_0a,w;[7B4h3W/n8J(^
算式:提示9M+I9g(G8n7q2i/V-K/_0a,w;[7B4h3W/n8J(^
答:两根铁丝原来长*W)C6z9P5f2?6o,~*m9L0M-y*~米。-K/_0a,w;[7B4h3W/n8J(^