0.7X(6.3-2.6)/0.37这道题怎么简算?
0.7X(6.3-2.6)/0.37这道题怎么简算?
x-0.7x=1.5怎么算
这道题怎么算x²-2x
4500÷(45X 25)简算怎么解?
(x-2.6)/5=(x+5-2.6)/7.5怎么算?
1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)化简怎么算?
0.7X十0.9(500一X)=386怎么算?
x(x 2)-(x-1)(x 2)=3 这道题怎么化简
x(x+2)-(x-1)(x+2)=3 这道题怎么化简
0.2x^2-0.3x+0.5-0.1x^2+0.7x-0.11怎么算?
1/X+1/(1+5)=1/6这道题怎么算X?
3X加2(9-x)=21这道题怎么算,