5x=12分之15怎么做
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/20 11:43:51
2x-5/6-2/3=1/22x=5/6+2/3+1/2=5/6+4/6+3/6=2x=1
/>(x-8)+4分之3x=42x-8+(3/4)x=42(7/4)x=42+8(7/4)x=50x=50×(4/7)x=200/7
10*(48-x)=28480-10x=28-10x=-452x=45.2X+1/4X=2504X+X=10005X=1000X=200x*(1-1/4-1/5)=55011/20*x=550x=10
7x=28/15+3x4x=28/15x=7/15
(4x-1)/0.5-(5x-0.8)/0.2=(1.2-x)/0.1+38x-2-25x+4=12-10x+37x=-13x=-13/7
2/7+3/5-x=19/35-1/5=2/7+3/5-19/35-1/5=xx=2/7+3/5-19/35-1/5x=2/7+(3/5+1/5)-19/35x=2/7+(3/5+1/5)-19/35
x+5=3*15x=45--5x=40
(1/3)/(1/20)=(16/9)/x(1/3)X20=(16/9)/xx=(16/9)X(3/20)x=4/1510/x=(1/2)/(4/5)10/x=(1/2)X(5/4)10/x=5/8x
x-1/5x=2/3÷17/184/5x=12/17x=12/17÷4/5x=15/17
移项左边是+2分之9则移到右边是-2分之9所以x=12-2分之9x=2分之13
1/8x*x=270x*x=270*8x*x=2160x约等于46.476
7x/4=12x=48/7
x-3/5x=202/5x=20x=50
(1)2/3X-1/5X=7+2/77/15X=51/7X=765/49(2)(80-9.8)×0.6-2.1=70.2×0.6-2.1=(70+0.2)×0.6-2.1=42+0.12-2.1=40
两边同乘以30,得20X=27,得X=20分之27
7/10+x+1/2=15/87/10+x+5/10=15/86/5+x=15/8x=15/8-6/5x=75/40-48/40x=27/40
2x/3-x/4=5/128x/12-3x/12=5/125x/12=5/12x=1
你上几年级啊!