Question

帮忙解个方程吧,要过程。

【40X+35.5*(8-X)+3*36】÷11=38.5

Answer 1

[40x+35.5*(8-x)+3*36]/11=38.5
解：[40x+284-35.5x+108]/11=38.5
[4.5x+392]/11=38.5
[4.5x+392]/11*11=38.5*11
4.5x+392=423.5

4.5x=31.5
x=7

Answer 2

(40x＋35.5*(8－x)＋3*36]÷11＝38.5
40x＋284－35.5x＋108＝423.5
40x－35.5x＝423.5－108－284
4.5x＝31.5
x＝31.5÷4.5
x＝7

不懂可追问！

Answer 3

解：40X+35.5*8-35.5X+3*36=38.5*11
4.5X=38.5*11-38.5*8-3*36
4.5X=38.5*3-3*36
4.5X=2.5*3
X=7.5/4.5
X=5/3

Answer 4

40X+284-35.5X+108=38.5*11
4.5X=423.5-284
4.5X=139.5
X=31

Answer 5

[40x＋35.5*(8－x)＋3*36]÷11＝38.5
40x＋284－35.5x＋108＝423.5
40x－35.5x＝423.5－108－284
4.5x＝31.5
x＝31.5÷4.5
x＝7