2.8x-0.17=0.4x+0.19
2.8x-0.17=0.4x+0.19
(X+X)+(X-X)+(X*X)+(X/X)=100
X-0.4X=36
0.2x+0.4x=12 x=?20x+x=420 x=?
解方程(一定要有完整的过程!):1、3x-4+2x=4x-3 2、2.8x=19.32-6.4x 3、0.4(x-0.2
x+x=x+15
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!)+.
14.5-2(x+3)÷5=0.5x÷0.1-(0.4x-2.8)÷0.6
(X-10000)/(X/0.17)=0.1,求X,
0.7x+12.3x=2.8+0.5x
8.4x-2.8x+6=80.8-1.2x
方程x-0.4x+360:x=3: