7/4x-1/2x=6.26 7x+402x乘2=21 解方程
问题描述:
7/4x-1/2x=6.26 7x+402x乘2=21 解方程
答
7/4x-1/2x=6.26
5/4x=6.26
x=6.26÷1.25
x=5.008
7x+402x乘2=21
7x+804x=21
811x=21
x=21/811
答
x=5.008
x=38.62
答
两边乘以20
35x-10x=125.2
25x=125.2
x=5.008
7x+402x*2=21
811x=21
x=38.62