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歡迎您訪問數學考題練習:解方程:(1)4x+3(0.2-2x)=(8-!

數學考題練習:解方程:(1)4x+3(0.2-2x)=(8-

更新時間:2024-01-12 16:31:06作者:貝語網校

解方程:

(1)4x+3(0.2-2x)=(8-6x)-2x;

(2).

試題答案

解:(1)去括號,得

4x+-6x=4-3x-2x

移項,合并同類項,得

3x=

系數化為1,得

x=.

(2)去小括號,得

[--2]+2x=3

去中括號,得

x-+2x=3

移項,合并同類項,得

3x=

系數化為1,得

x=.

試題解析

(1)將方程去括號,然后移項,合并同類項,系數化為1,即可求解.

(2)先將方程去小括號,再去中括號,然后將方程移項,合并同類項,系數化為1,即可求解.

點評:此題主要考查學生對解一元一次方程的理解和掌握,此題難度不大,屬于基礎題.解一元一次方程的基本思路是:通過對方程變形,把含有未知數的項移到方程的一邊,把常數項移到方程的另一邊,最終把方程“轉化”為x=a(a為常數)的形式.

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