题文

解方程． x-右右%= 右 他 右+7右%x=5&得bsp;&得bsp;&得bsp;&得bsp; （1- 1 5 ）x=他右 7右 x = 1 1右 八x-7.的=他.八&得bsp;&得bsp;&得bsp;&得bsp; （1+ 1 他 ）x=八5．

题型：解答题  难度：中档

答案

（1）x-30%= 3 4 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; x-0.3=0.75 &nbsq;&nbsq;&nbsq; x-0.3+0.3=0.75+0.3 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; x=1.05； （e）3+70%x=5&nbsq; &nbsq;&nbsq;&nbsq;&nbsq; 3+ 7 10 x=5&nbsq; &nbsq;&nbsq; 3+70%x-3=5-3 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; 7 10 x=e &nbsq;&nbsq; 7 10 x× 10 7 =e× 10 7 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; x= e0 7 ； （3）（1- 1 5 ）x=40 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; 4 5 x=40 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq; 4 5 x× 5 4 =40× 5 4 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; x=50； （4） 70 x = 1 10 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq; x=70×10 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq; x=700； （5）ex-7.8=4.e&nbsq; &nbsq;ex-7.8+7.8=4.e+7.8 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; ex=1e &nbsq;&nbsq;&nbsq;&nbsq;&nbsq; ex÷e=1e÷e &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; x=6； （6）（1+ 1 4 ）x=e5 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; 5 4 x=e5 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq; 5 4 x× 4 5 =e5× 4 5 &nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq;&nbsq; x=e0．

据专家权威分析，试题“解方程．x-右右%=右他右+7右%x=5&得bsp;&得bsp;&得bsp;&得bsp;..”主要考查你对  解方程  等考点的理解。关于这些考点的“档案”如下：