解下列方程.0.8(0.5x-12.
解下列方程.0.8(0.5x-12.3)=23.6;(1.2x+3.52)×1.7=12.92....
解下列方程.0.8(0.5x-12.3)=23.6;(1.2x+3.52)×1.7=12.92.
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(1)0.8(0.5x-12.3)=23.6
0.8(0.5x-12.3)=23.6÷0.8
0.5x-12.3=29.5
0.5x-12.3+12.3=29.5+12.3
0.5x=41.8
0.5x÷0.5=41.8÷0.5
x=83.6.
(2)(1.2x+3.52)×1.7=12.92
(1.2x+3.52)×1.7÷1.7=12.92÷1.7
1.2x+3.52=7.6
1.2x+3.52-3.52=7.6-3.52
1.2x=4.08
1.2x÷1.2=4.08÷1.2
x=3.4.
0.8(0.5x-12.3)=23.6÷0.8
0.5x-12.3=29.5
0.5x-12.3+12.3=29.5+12.3
0.5x=41.8
0.5x÷0.5=41.8÷0.5
x=83.6.
(2)(1.2x+3.52)×1.7=12.92
(1.2x+3.52)×1.7÷1.7=12.92÷1.7
1.2x+3.52=7.6
1.2x+3.52-3.52=7.6-3.52
1.2x=4.08
1.2x÷1.2=4.08÷1.2
x=3.4.
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