4x+5x-5 =40怎么解

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4x+5x-5=40怎么解4x+5x-5=40怎么解4x+5x-5=40怎么解4x+5x-5=40(4+5)x-5+5=40+59x=45x=45/9x=5采纳我吧4x+5x-5=409x=40+59

4x+5x-5 =40怎么解
4x+5x-5 =40怎么解

4x+5x-5 =40怎么解
4x+5x-5 =40
(4+5)x-5+5=40+5
9x=45
x=45/9
x=5
采纳我吧

4x+5x-5=40
9x=40+5
9x=45
x=5

dfghgfyn

4x+5x-5 =40
9x=45
x=5

4x+5x-5 =40
(4+5)x-5+5=40+5
9x=45
x=45/9
x=5

4X+5X-5=40
4X+5X=45
9X=45
X=5