求:3(x-1.2)=9.03 解方程 还要检验的过程
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求:3(x-1.2)=9.03 解方程 还要检验的过程
求:3(x-1.2)=9.03 解方程 还要检验的过程
求:3(x-1.2)=9.03 解方程 还要检验的过程
3(x-1.2)=9.03
3x-3×1.2=9.03
3x=9.03+3×1.2
3x=12.63
x=4.21
验算:3(x-1.2)=3(4.21-1.2)=3×3.01=9.03
3x=9.03+1.2*3
x=3.01+1.2
x=4.21
3(x-1.2)=9.03
x-1.2=3.01
x=3.01+1.2
x=4.21
检验:
x=4.21时
左边=(4.21-1.2)×3=9.03
右边=9.03
左边=右边
成立
3(x-1.2)=9.03
x-1.2=9.03/3
x-1.2=3.01
x=3.01+1.2
x=4.21
3(x-1.2)= 3(4.21-1.2)=9.03
3(x-1.2)=9.03
x-1.2=9.03÷3
x-1.2=3.01
x=3.01+1.2
x=4.21
3x-3.6=9.03
3x=12.63
x=4.21
3(4.21-1.2)
=12.63-3.6
=9.03
3(x-1.2)=9.03
3x-3.6=9.03
3x=6.03+3.6
3x=12.63
x=4.21