1 初一年级解方程练习题1、依据下列解方程的过程, 请在前面的括号内填写变形步骤,在后面的括号内填写变形依据.解:原方程可变形为()去分母,得3(3x+5)=2(2x﹣1).()去括号,得9x+15=4x﹣2.()(),得 9x﹣4x=﹣15﹣2.()合并,得 5x=﹣17.()(),得 x=.() 5(x﹣5)+2x=﹣4 6(x﹣5) =﹣24 5(x+8)﹣ 5=6(2x﹣7)7、=﹣1﹣=1 1﹣3(8﹣ x)=﹣2( 15﹣2x)5( x+8)=6(2x﹣7)+5 4( 2x+3)=8(1﹣x)﹣ 5(x﹣2)2 =﹣2 ﹣2=12(2﹣3x)=4x+4 ﹣1=2﹣=x﹣﹣1=x - 27 x=432x+ 25 = 3570%x + 20%x = 3
6 x×53 =20×41 25% + 10x= 54x- 15% x = 68 x+83 x=121 5x-3×215 =7532 x÷41 =12 6x+5 =13
4 3x=833 x÷72 =167x+87 x=434x-6×32 =2 125÷x=31053 x = 722598 x= 61 ×5116x÷356 =4526 ×25134x-3 ×9 = 29 21 x + 61 x = 4 103 x-21×32 =4 2041 xx8)6
2(2 x6x+5 =13
4 25 x-13 x= 3104x-6=38 5x=1915x+25%x=90 218 x=154x÷54 =281532 x÷41 =12 x-37 x= 8953 x=722598 x=61 ×51164 x÷356 =4526 ÷2513x-0
25=414+0
7x=102 32 x+21 x=42 x+41 x=105 x-83 x=400 x-0
125x=8 x+37 x=18 x×( 16 + 38 )= 1312x-0