15.5-0.4(x+3)=3/4x-2/5(x-5)
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15.5-0.4(x+3)=3/4x-2/5(x-5)
15.5-0.4(x+3)=3/4x-2/5(x-5)
15.5-0.4(x+3)=3/4x-2/5(x-5)
15.5-0.4x-1.2=0.75x-0.4x+2
14.3-0.4x=0.35x+2
0.75x=12.3
x=12.3÷0.75
= 16.4
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
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请问这道题咋做 :(x)X (x+1) X (x+2) X (x+3) =360