8(x一2)＝2(x＋7)

8(x一2)＝2(x＋7) 7x十2（3x一3）＝20 2(x＋8)＝3x一1 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X 3x方一[7x一3(4x一3)一2x方] 3x平方一(7x一(4x一3)一2x平方) *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x (2x一3)一2(7一x) （x的次方一X十4）X一（X一1）（x的次方十2）＝x十7 (7一2X十x平方)一(5十3X一2x平方) (7y一2x)一(7x一4y) (一b十+3a)一(4a一b) ((7y一2x)一(7x一4y) (一b十+3a)一(4a一b) (一8x的2次方+6x)一(5x的2次方一4x+1) 一40x(0.15-8分之7+3又2分之1) (一25)x(一85)x(一4) 5X一2=7X十8 5x＋2（1一3x）＝3（2一0．5x）x＝? （X＋2）（X＋4）一X（X＋1）一8 帮我计算一下 4(2X一9)+3(X一15)=7(X一1)一2 {x一3(X一1)≤7,1一3分之2一5X 4(2x一7)一2(x一1)=3(x一1)一2 x=?