www.5129.net > 2X+4×(20%X)=50解方程

2X+4×(20%X)=50解方程

20%x+4分之1(x-1)=3x-(2x+50%) 0.2x+(x-1)/4=3x-2x-0.5 0.2x+(x-1)/4=x-0.5 0.8x+(x-1)=4x-2 0.8x+x-1=4x-2 4x-0.8x-x=2-1 2.2x=1 x=5/11

2×+4×(20-×)=50 2×+80-4×=50 -2×=50-80 两边都是负数,去掉负数就是正数 ×=30÷2 ×=15

(1)(1+25%)x=60 1.25x=60 1.25x÷1.25=60÷1.25 x=48(2)75%x+2=16 34x+2=16 34x+2-2=16-2 34x=14 34x×43=14×43 x=563(3)14×60%+2x=8 14×35+2x=8 320+2x=8 320+2x-320=8-320 2x=15720 2x÷2=15720÷2 x=15740(4)3-20%x=1.2 3-0.2x=1.2 3-0....

36(x-20)=30(x+12) 6(x-20)=5(x+12) 6x-120=5x+60 x=180

20+70%x=160 70%X=160-20 70%X=140 X=140➗70% X=200

原式 90X+18X+50=210+X 107X=210-50 X=160/107 =1又107分之53

3分之1X-20%X=6 x/3-x/5=6 2x/15=6 x=6*15/2 x=45 X+10%X=33 1.1x=33 x=30 1÷(X+3分之2)=5分之4 x+2/3=5/4 x=5/4-2/3 x=15/12-8/12 x=7/12 X-5分之4X=15分之4 x/5=4/15 x=4/15*5 x=4/3

6x+90%x+0.5%xX2+(50%x+20% x)=76.1 6x+0.9x+0.01x+0.5x+0.2x=76.1 7.61x=76.1 x=10

网站地图

All rights reserved Powered by www.5129.net

copyright ©right 2010-2021。
www.5129.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com