解方程:2.1(X-0.7)=4.2一定要周末前回答
问题描述:
解方程:2.1(X-0.7)=4.2
一定要周末前回答
答
2.1(X-0.7)=4.2
2.1x-1.47=4.2
2.1x=4.2+1.47
2.1x=5.67
x=5.67÷2.1
x=2.7
答
解方程:2.1(X-0.7)=4.2
2.1(X-0.7)=4.2
x-0.7=4.2除以2.1
x-0.7=2
x=2+0.7
x=2.7
答
2.1(X-0.7)=4.2
X-0.7=4.2÷2.1
X-0.7=2
X=2+0.7
X=2.7