解:按题意列方程式6.2x+5.2=41.6+x二边同时扩大10倍,心数转整数62x+52=416+10x即62x-10x=416-52=35452x=364x=364/52=7
6.2x+5.2=41.6+x 解:6.2x=41.6-5.2 5.2x =36.4 x =7 可以用等式的基本性质(1)了
5.4*0.2-1.8x=2.7*0.25.4*0.2-2.7*0.2=1.8x(5.4-2.7)*0.2=1.8x2.7*0.2=1.8x0.54=1.8xx=0.3