{5/6-(2/5+1/3)}x5/7
1个回答
全体通分吧,6、5、3的公倍数是30
[25/30-(12/30+10/30)]×5/7
=(25-12-10)/30×5/7
=3/30×5/7
=1/14
相关问题
1.-3-2x(-5) 2.8-(-6)x(-7+5) 3.7-24x(-1/3+5/6)
2/3+x-1/4=5/6 x-2/7+1/3=5/6
(1).6(x/3+x-1/2 ) (2).(7-3a)+(5a-6) (3).(x-3)-(5x+7)
5^6*5^-3=5^6*1/5^3=5^6/5^3=5^6-3=5^3=5^6+(-3) 7^4/7^-2=7^4/1
解比例:X:0.5=3/4 1/2:X=1/6:2/5 7/2:X=3/5:1/7
解方程.2.5x+7.5=18.5 13-[1/3]x=5 [1/2]x+[2/3]x=[5/6].
因式分解:(1)x^2-7x+6(2)x^2-5x+6(3)x^2-5x-6(4)x^2-7x+8(5)x^2-7x+1
解方程① 1 6 (3x-6)= 2 5 x-3 ② x 0.5 - 3x-1 0.7 =5 .
5-7X/6=3-5X/5=1
5/12x-x/4=1/3 0.5x-0.7=6.5-1.3x 3(x-7)+5(x-4)=15 (y-1)/2=2-(