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解方程.9.1%x=7.9 x÷5.3=2.4 x+7.7=13.8

(1)1.7x+130%x=6 3x=6 3x÷3=6÷3 x=2;(2)13-20%x=8 13-20%x+20%x=8+20%x 8+20%x=13 8+20%x-8=13-8 20%x=5 20%x÷20=5÷20% x=25;(3)37x-514x=70% 114x=70% 114x×14=70%×14 x=9.8.

5-7x=2x-13 7x+2x=5+13 9x=18 x=2 (3x+16)/2=4x-7 3x+16=8x-14 8x-3x=16+14 5x=30 x=6 (5y-11)/7=(11y+3)/21 等式两边同时乘以21 3(5y-11)=11y+3 15y-33=11y+3 15y-11y=3+33 4y=36 y=9 27%x-17%=20%x+1/4 27%x-20%x=1/4+17% 0.07x=0.42 x=6

一、解方程 X÷70%=100 2/3X+75%=34 60%X+70%X=1.69 (70+X)%=1.4 3/4-25%X=20 X-30%X=7 18%X-12.5%X=5.5 (1+35%)X=270% 15-10%X=1 50×18%-1.8X=7.2 x-40%=3.6 30%x+90=117 60%+4x=27.6 25%x-16=24 x-20%=28 9.1-14%x=0.7 11.5x-1.5%x=7 35%x...

如图

0.48*(x+0.9)=7.2 x=7.2/0.48-0.9 =15-0.9 =14.1

1一40%x=0.7 解:0.4x=1-0.7 0.4x=0.3 x=0.3÷0.4 x=0.75

x=-195,y=-70 x=200,y=160 x=322/109,y=60/109 希望能帮到你!

M=0, I=0.0013

(1)76%x-21%x=110, (76%-21%)x=110, 0.55x=110, 0.55x÷0.55=110÷0.55, x=200;(2)(1-75%)X=1, 0.25X=1, 0.25X÷0.25=1÷0.25, X=4;(3)150%x-140%x=25, (150%-140%)x=25, 0.1x=25, 0.1x÷0.1=25÷0.1, x=250;(4)9.1-14%x=...

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