求未知数的值.6.2-x =416,7x+2.5x =3.8,(3.8-2)x =14.4,3x -0.5=5.8,4*

来源：学生作业帮编辑：搜狗做题网作业帮分类：数学作业时间：2024/06/22 16:24:46

求未知数的值.6.2-x =416,7x+2.5x =3.8,(3.8-2)x =14.4,3x -0.5=5.8,4*6+4x =84,10*(15-x )=120

6.2-x=416
x=-409.8;
7x+2.5x=3.8
9.5x=3.8
x=0.4;
(3.8-2)x =14.4
1.8x=14.4
x=8;
3x-0.5=5.8
3x=6.3
x=2.1
4*6+4x =84
24+4x=84
4x=60
x=15
10*(15-x )=120
150-10x=120
10x=30
x=3

求未知数的值.6.2-x =416,7x+2.5x =3.8,(3.8-2)x =14.4,3x -0.5=5.8,4* 4x+2=2x+18 求未知数x 3X+2=X+20求X Y未知数 5/3x=2/1x+7 求未知数x的值求满足方程3x(3x-3)-(4-2x)x=（4x-1）*2x的未知数x的值 3x²-{7x-(4x-3)-2x²=?注：x=未知数. 已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值求未知数x的值：根号3x+根号3=2-2x 方程X-3/4X=3/8求未知数x的值求未知数:8(3x-6)=6(4x-7)-3(2x+1) 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值