x-0.6x=0.7
0.6x+0.7x=2.
(X+X)+(X-X)+(X*X)+(X/X)=100
x-0.7x=18
x-0.7x=0.51
x+x=x+15
x-o.8x=6 12x-8x=4.8 3x-8=16 7.5x-2x x-0.7x=3.6 求答案
4X-24=2X+20 2X(X-0.7)=4.8 0.6X+3X2.5=67.5 (X-7)除以3=8 5X-1.5X
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
0.4(x-0.2)+1.5=0.7x-0.38 (0.6x+420)÷(x+20)=3
0.7-0.1x/0.6-0.01x-0.01/0.04=x+1
0.7x+1.37=1.5x-0.23 x=?
x-(0.1x+20)=28-0.7x怎么解