-7+13-6+20= (-49)-(+91)-(-5)+(-9)= 1+(-2)+|-2-3|-5= (-5)x(-7
A%(X-5)+B%(X+2)=(5X-4)%(X平方-3X-10)
六年级的方程,只有五道 x-128×3=0.06-2x x(2+x)=4x(12+3x) 7x+5
15-(7-4x)=2x+(5-2x) 4分之X减8分之3X减1=1 0.7分之X-0.03分之0.17-0.2X=1
8x的平方-(x-2)(3x+1)-2(x+1)(x-5) x=2
解下列分式方程:(1)1/x-10+1/x-6=1/x-7+1/x-9 (2)x-2/x+3=3- X平方-9分之2X平
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
1、(3x²-2x²+5x-2)-( )=4x³-x²+5
(﹣x+2x²+5)+(4x²-3-6x)
3(x-1)+13>5x-2(5-x) 5-(2x+1)<3-6x
x+2/x+3-x+1/x+2=x+8/x+9-x+7/x+8
数学题(x-4)/(x-3)+(x-6)/(x-5)=(x-8)/(x-7)+(x-10)/(x-9)解方程,
解方程,( 2x-1)²=x(3x+2)-7