2.1X+7.9X=6.9解方程.5X+0.8乘2=7.3解方程
问题描述:
2.1X+7.9X=6.9解方程.5X+0.8乘2=7.3解方程
答
1. 2.1x+7.9x=6.9
10x=6.9
x=0.69
2. 5x+0.8*2=7.3
5x+1.6=7.3
5x=5.7
x=1.14
答
2.1X+7.9X=6.9
10x=6.9
x=6.9/10
x=0.69
5X+0.8乘2=7.3
5x+1.6=7.3
5x=7.3-1.6
5x=5.7
x=5.7/5
x=1.14