作业帮 > 数学 > 作业

数学简便运算+方程2/3X-13/30=1/5XX/25=1.2/755又-X=36X+0.5×7=6.52.5/X=7

来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/05/20 21:49:36
数学简便运算+方程
2/3X-13/30=1/5X
X/25=1.2/75
5又-X=3
6X+0.5×7=6.5
2.5/X=7.5/12
简便运算
2÷[（5/6-2/9）×1/11]
7.25×7.3-3.3×7.25
220÷[56×（3/7-3/8）]
（1/3+1/4-1/6）×24
2/3X-13/30=1/5X
(2/3+1/5)x=13/30
13/15x=13/30
x=1/2
X/25=1.2/75
x=25*1.2/75=1.2*25/75=1.2/3=0.4
5+1/4-X=3
x=5+1/4-3=2+1/4=9/4
6X+0.5×7=6.5
6x+3.5=6.5
6x=6.5-3.5
6x=3
x=0.5
2.5/X=7.5/12
1/x=3/12
x=12/3
x=4
2÷[（5/6-2/9）×1/11]
=2÷[（45/54-12/54）×1/11]
=2÷[（11/18）×1/11]
=2÷[1/18]
=2×18
=36
7.25×7.3-3.3×7.25
=7.25*(7.3-3.3)
=7.25*4
=7*4+0.25*4
=28+1
=29
220÷[56×（3/7-3/8）]
=220÷(56×3/7-56×3/8）
=220÷(24-21)
=220÷3
=220/3
（1/3+1/4-1/6）×24
=1/3×24+1/4×24-1/6×24
=8+6-4
=10
解方程 x-2/3+x-3/5+x-2/7+x-5/9+x-1/11=18 过程写出来,要简便运算的 解方程(x+1/x+2)-(x+2/x+3)=(x+5/x+6)-(x+6/x+7) 解方程：x+2/x+1-x+3/x+2=x+6/x+5-x+7/x+6 x-1\x-2+x-6\x-7=x-2\x-3+x-5\x-6 分式方程 解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3 解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20 解方程:2(X-3)(X+5)=X平方+(X+2)(X-2)+(X+7) 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 方程(x-1/x-2)-(x-3/x-4)=(x-2/x-3)-(x-4/x-5)解为x=7/2,(1/x-7)-(1/ 解方程(x-2)/(x-3)-(x-3)/(x-4)=(x-5)/(x-6)-(x-6)/(x-7) 分式方程【初二数学】x+5/x²-x + 6/1-x =3/x 解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)