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5.9x0.3-1.9X=0.06(解方程)

1.77-0.06=1.9x 1.9x=1.71 x=0.9

5.9×0.3-1.9x=0.06 1.77-1.9x=0.06 1.9x=1.77-0.06 1.9x=1.71 x=1.71÷1.9 x=0.9

即1/(x+3)+2/(x-3)=1/(x+3)(x-3) 两边乘(x+3)(x-3) x-3+2x+6=1 3x=-2 x=-2/3 经检验,x=-2/3是方程的解

1)1.5x+3x=6 4.5x=6 x=6/4.5 =4/3 2)2x-1.5x=1.9 0.5x=1.9 x=1.9/0.5 =3.8 3)0.54 x-4.5*6=45 0.54x-27=45 0.54x=45+27=72 x=72/0.54 =400/3 4)7x-0.4=0.3 7x=0.3+0.4=0.7 x=0.7/7 =0.1 5)8x+5x=65 13x=65 x=65/13 =5 6)0.9x-3*1.2=7.2...

x-6分之5等于1 解:x=1+5/6 x=1又5/6 9分之5+x=5分之3 解:x=3/5-5/9 x=27/45-25/45 x=2/45

1.9-0.5x=0.28 1.9-0.28=0.5x 1.62=0.5x x=1.62/0.5 x=3.24

两边同乘以0.2 x-9 = 1.6 X 0.2 = 0.32 两边同时加9 x = 0.32+9 = 9.32

0.45x-1.5x=1.9解方程得x=-21分之38,具体计算过程如下: 0.45x-1.5x=1.9 -1.05x=1.9 x=1.9÷(-1.05) x=-105分之190 x=-21分之38

解法一:运用平方差公式因式分解 (x-2)²-9(x+1)²=0 [(x-2)+3(x+1)][(x-2)-3(x+1)]=0 (4x+1)(-2x-5)=0 (4x+1)(2x+5)=0 x=-1/4或x=-5/2 解法二:等式两边同时开平方 (x-2)²=9(x+1)² x-2=3(x+1)或x-2=-3(x+1) 2x=-5或4x=-1 x=-...

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