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7.9x-x=8.97.方程怎么解?

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7.9x-x=8.97 6.9x=8.97 x=1.3

7.9x-x=8.97 6.9x=8.97 x=1.3 左边=7.9*1.3-1.3=10.27-1.3=8.97=右边

7.9x-x=8.97 (7.9-1)x=8.97 6.9x=8.97 x=8.97/6.9 x=1.3

1.25x8.97x0.8 =1.25×0.8×8.97 =1×8.97 =8.97

2.7x+3=97.5 解:2.7x=97.5-3 x=94.5÷2.7 x=35 0.95÷0.4x=1.9 解:0.4x=0.95÷1.9 x=0.5÷0.4 x=1.25 6.8+x=24.5 解: x=24.5-6.8 x=17.7 6x-4x7.5=24 解: 6x=24+30 x=54÷6 x=9 4.8x-8=25.6 解:4.8x=25.6+8 x=33.6÷4.8 x= 7 12x-6x5=210 解: 12...

1.25x9.97x0.8 =1.25x0.8x9.97 =1x9.97 =9.97

8.97/1/3+8.97x97 =8.97x3+8.97x97 =8.97x(3+97) =8.97x100 =897

(1)6.7+3x=8.2, 6.7+3x-6.7=8.2-6.7, 3x÷3=1.5÷3, x=0.5;(2)1.8x-9.2=8.8, 1.8x-9.2+9.2=8.8+9.2, 1.8x÷1.8=18÷1.8, x=10;(3)4.3x-1.8x=97.5, 2.5x=97.5, 2.5x÷2.5=97.5÷2.5, x=39.

7.9x-x=8.97 6.9x=8.97 x=8.97÷6.9 x=1.3

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