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5x一3.2x=153,解方程要有过程?

5X-3.2X=153 (5-3.2)X=153 1.8X=153 X=153÷1.8 X=

5X-3X=9-4.8 2X=4.2 X=2.1

4-3x=1+5x 4-1=5x+3x 3=8x x=3/8

展开计算就可以了,过程见下图

(1)去括号得:5x+6-3x=8,移项合并得:2x=2,系数化为1得:x=1;(2)去分母得:3(

x1+x2=5 (1) 2x1+x2+x3+2x4=1 (2) 5x1+3x2+2x3+2x4=3

(5x+11)/2x=3 5x+11=6x 6x-5x=11 x=11 朋友

(1)移项,得5x-7x=-3-9,合并同类项,得-2x=-12,系数化为1,得x=6;(2)去括号

3/5X-1/2=2/5 乘以10得 6x-5=4 6x=9 x=1.5

3/2[2(x-1/2)+2/3]=5x 3/2[2x-1+2/3]=5x 3x-3/2+1=5

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