(500 100x)(0.75-0.1x)=120-搜答案-智慧作业帮

4x+3.6﹦8x－4.83.6+4.8=8x-4x4x=8.4x=2.175(x-0.75)=60x75x-75×0.75=60x75x-60x=75×0.7515x=75×0.75x=5×0.75

(1)0.25x=-5x=-20(2)3x-4x=1-5x=4(3)3x-4x=18-5x=-13(4)1+7=x+7xx=1(5)9x-7x-3x=-8x=8(6)-x+3x=3-2x=1/2(7)

(x

展开式的通项为Tr+1＝(−12)rCr10x30−5r令30-5r=0得r=6故展开式的常数项为(−12)6C610＝10532故答案为10532

0.75-0.6+X=1.05

0.75-0.6+X=1.050.15+x=1.05x=1.05-0.15x=0.9

x+20％x=3601.2x=360x=300x+50％x=0.751.5x=0.75x=0.53分之一x-4分之一x=24分之一1/12x=1/24x=1/2x-35％x=3900.65x=390x

1.4 :x=1 :0.75

1.4*0.75=xx=1.05

解(1)x-0.75x=120.25x=121/4x=12x=12×4x=48(2)2.8x+x=7.63.8x=7.6x=7.6÷3.8x=2(3)2.36x+2.64x=185x=18x=18÷5

|x|

7.5x减5.5x等于0.75

7.5x-5.5x=0.752x=0.75x=0.375

x

1：1.9-0.1=(1-0.75)x0.25x=1.8x=7.22：72-30=(12-13+3)x2x=42x=213：-120+200=(8.4+17-9.4)x16x=80x=54：(15.2

方程是啥?如果为：x^0.75-x^0.25=0.75令t=x^0.25,则x^0.75=t^3方程化为:t^3-t=0.75,解得：t=1.26255112740716x=t^4=2.5409486

5x+2x=33.6,7x=33.6;x=4.8;7x-4x=0.75,3x=3/4;x=1/4;2x+7x+2.1=12,9x=8.1;x=0.9;56x-32x-119=36124x=480;x=

x-0.75x=5.6解方程

0.25x=5.6（合并同类项）x=5.6/0.25（移项）x=22.4望采纳!

3.5X—1.5X=10.82x=10.8x=5.42.36X+2.64X=185x=18x=3.6X—0.75x=120.25x=12x=482.8X+X=7.63.8x=7.6x=2

解方程：x-0.75x=42

苍月Swart,你好：x-0.75x=420.25X＝42X＝42÷0.25X=168

10x-3.14*x*x*0.25=3.14*x*x*0.7510x=3.14*x*x*0.75+3.14*x*x*0.253.14*x*x*(0.75+0.25)-10x=03.14*x*x-10x

，x

解题思路：同学你好，本题利用同角三角函数的基本关系求解，具体过程见解析解题过程：

X-0.75X=三分之一X-10则0.25x=(x-10)/3则0.25x*3=x-10则10=x-0.75x则0.25x=10所以x=40