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(x%2)/3+(5%2x)/6=2x+1

根据题意可得:(1)x+23x-1=4, 53x-1=4, 53x-1+1=4+1, 53x=5, 53x÷53=5÷53, x=3;(2)12:x=3:4, 3x=4×12, 3x=2; 3x÷3=2÷3; x=23;(3)19-12%x=7,19-12%x+12%x=7+12%x, 12%x+7=19, 12%x+7-7=19-7, 12%x=12, 12%x÷12%=12÷12%,...

1、40%x=12 x=12/0.4 x=30 2、(1+60%)x=24 1.6x=24 x=24/1.6 x=15 3、(1-37.5%)x=10 5x/8=10 x=10*8/5 x=16 2x+50%x=20 2.5x=20 x=20/2.5 x=8 4、40%x+30%x=140 0.7x=140 x=140/0.7 x=200 5、35%x-15%x=72 0.2x=72 x=72/0.2 x=360

y轴上x=0 x轴下方则y

[56x(5/7-2/8)-0.625x0.5+5/8+1/2x62.5%]÷2又1/4 =(56×5/7-56×2/8-5/8×1/2+5/8+1/2×5/8)÷9/4 =[40-14-5/8]×4/9 =203/8×4/9 =203/18

第一个x是5000 第二个是-248.75 第三个是2000

3/4-2x=0.625 x=(3/4-0.625)/2 =(0.75-0.625)/2 =0.125/2 =0.0625

15.2x12.5%+8分之1x5.8-0.125 =0.125x(15.2+5.8-1) =0.125x20 =2.5

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6﹑书店有一批新书共4200本,第一周卖出1/4,第二...设丽丽有x元钱 家家有y元钱 得出: 3/5x=2/3y...(3.14×2x)+2x=41.4 6.28x+2x=41.4 8.28x...

1. x=1/2 3x-y=6 答案:x=1/2,y=-9/2 2. 2x-3y=7 y=3x 答案:x=-1,y=-3 3. m-2n=8 4(m-2n)+n=30 答案:m=4,n=-2 4....

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