0.4x-15.7=2.3解方程6(x-2/3)=4/5
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0.4x-15.7=2.3解方程6(x-2/3)=4/50.4x-15.7=2.3解方程6(x-2/3)=4/50.4x-15.7=2.3解方程6(x-2/3)=4/50.4x=2.3+15.70.4
0.4x-15.7=2.3解方程6(x-2/3)=4/5
0.4x-15.7=2.3解方程
6(x-2/3)=4/5
0.4x-15.7=2.3解方程6(x-2/3)=4/5
0.4x=2.3+15.7
0.4x=18
x=45
6(x-2/3)=4/5
x-2/3=2/15
x=4/5
0.4x-15.7=2.3
0.4x=18
x=45
0.4x=15.7+2.3
0.4x=18
x=18/0.4=45
解 0.4x=18
x=45
0.4x=18
x=18/0.4=45
6(x-2/3)=4/5
x=2/3+4/30
x=4/5