··0.4y+0.9/0.5-y-5/2=0.3+0.2y/0.3求y
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··0.4y+0.9/0.5-y-5/2=0.3+0.2y/0.3求y
··0.4y+0.9/0.5-y-5/2=0.3+0.2y/0.3求y
··0.4y+0.9/0.5-y-5/2=0.3+0.2y/0.3求y
确定原式是:0.4y+0.9/0.5-y-5/2=0.3+0.2y/0.3?
左右同乘以30,得:
12y+54-30y-75=10+20y
38y=31
y=31/38
··0.4y+0.9/0.5-y-5/2=0.3+0.2y/0.3求y
·0.4y+0.9/0.5-y-5/2=0.3+0.2y/0.3求y
(-2y^2)^3+y·y^5
解方程:1/3(3y- 10-7y/2)-1/2(2y-2y+2/3)=y/2-1 0.4y+0.9/0.5-0.03+0.02y/0.03=y-5/2注意:这是一题1/3(3y- 10-7y/2)-1/2(2y-2y+2/3)=y/2-1 这是一题:0.4y+0.9/0.5-0.03+0.02y/0.03=y-5/2 请在注意:10-7y/2这是一个分数;2y+2/3这是
maths(right,very esay①(1-y)/2=2-[(2y-1)/3]②21%x-5%=5%x+0.11③(2y-1)/3-(10y+1)/6=(2y+1)/4-1④1/3[3y-(10-7y)/2)]-1/2[2y-9(2y+2)/3)]=y/2-1⑤(0.4y+0.9)/0.5-(0.03+0.02y)/0.03=(y-5)/2
计算.2x÷x/5x+3y^2-4y+4/2y-6·1/y+3÷12-6y/9-y^2
初一数学解方程:(0.4y+0.9/0.5)-(y-5/2)=0.3+0.2y/0.3初一数学解方程:(0.4y+0.9/0.5)-(y-5/2)=0.3+0.2y/0.3
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