x 4.6x=4.76怎样解方程
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(2x-16)x4/5=x+16(2x-16)x4=5(x+16)(两边同乘以5)8x-64=5x+80(去括号)3x=80+64=144(移项合并同类项)x=144/3=48所以方程解为x=48
6.5x-3.8x=272.7x=27x=106x+8x=44814x=448x=323.4x-5.1X4=6.83.4x-20.4=6.83.4x=20.4+6.83.4x=27.2x=8
5%x+(300-x)x4%=135x+(300-x)x4=13005x+1200-4x=1300x=1300-1200x=100
2.25x=90x=40
再答: 再问:第二张图片打不开再答:
(164-x)X4=126+x656-4x=126+x4x+x=126-6565x=-530x=-530/5x=-106
2.8x4+5x=17.211.2+5x=17.25x=17.2-11.25x=6x=6÷5x=1.2
2x+8.5x2=352x+17=352x=35-172x=18x=912.5x4-3x=23x=50-23x=48x=16
①(20-X)x4+2X=5080-4x+2x=502x=30x=15②7x-(10-x)×5=227x-50+5x=2212x=72x=6③8x+(15-x)×6=1008x+90-6x=1002x
4x+1.5x4=564x+6=564x=50x=25/2
2X+8×4-4X=26∴-2X=26-32解得:X=3
2x+(20-X)X4=642x+80-4x=644x-2x=80-642x=16x=8
3x-2X4+2x=12.53x+2x-8=12.55x=12.5+85x=20.5x=4.1
(15.3-12.8)x=2.5x^42.5x=2.5x^42.5=2.5x^3x=0或x=1
4x+44=74+x3x=30x=10
这就是最简单的一元一次方程,很容易的步骤如下:先把括号打开:4x+15*4+x=80把常数移到右边:4x+x=80-15*45x=20x=20÷5x=4我现在读的是数学专业(方程方向)的研究生,今年研
1-2x-56=3-x4-2x+4x=3-1+562x=58x=58/2
4x+20=5x-25x=45
原式=(X4-2X2+1)+2*(X3-2X2+X)=(X2-1)^2+2*X(X-1)^2=(X-1)^2(X+1)^2+2*X(X-1)^2=(X-1)^2((X+1)^2+2X)=(X-1)^2
(12.5+12.5%)x4=5x5x=50+0.5x=10+0.1x=10.1