2(3x-2)+4+(3x-2)+x=78
2个回答
由题知 6X-4+4+3X-2+X=78
10X=80
X=8
相关问题
(2x+4)+x+(x/3+2)=78怎么解
解4.4x-2.7x=5.78 2.5x-3.6=6.4
4xy+3x=56 5xy+2x=78
x1+5x2+2x3-4x4=3 -3x1-2x2+3x3+4x4=-6 -x1+3x2-x3-4x4=-2 -2x1+
解方程:x+3.4x=28.6 x-0.78x=0.33 7x-2x=25.5 3.6x+2.9x=4.55.
解方程:(1)1.2X-1.3=7.1(要检验)(2)7X+3X+26=78(3)6.8+3.2X=14.8(4)5.4
8(-2x)^4-(-3x^2)^2-【-(4x^2)^2】+3(-x)^3*x
(x1-x2+4x3-2x4=0;x1-x2-x3+2x4=0;3x1+x2+7x3-2x4=0;x1-3x2-12x3
线性方程组为:x1-x2-5x3+4x4=2 2x1-x2+3x3-x4=1 3x1-2x2-2x3+3x4=3 7x1
解线性方程组(1)2x1-x2+x3-2x4=7 (2)x1+2x2-3x3=-4 (3)-x1-x2+x3+4x4=4