2(0.3X+4)-5(0.2X-7)=9 方程解
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2(0.3X+4)-5(0.2X-7)=9方程解2(0.3X+4)-5(0.2X-7)=9方程解2(0.3X+4)-5(0.2X-7)=9方程解2(0.3X+4)-5(0.2X-7)=90.6x+8-
2(0.3X+4)-5(0.2X-7)=9 方程解
2(0.3X+4)-5(0.2X-7)=9 方程解
2(0.3X+4)-5(0.2X-7)=9 方程解
2(0.3X+4)-5(0.2X-7)=9
0.6x+8-x+35=9
0.4x=34
x=85
2(0.3X+4)-5(0.2X-7)=9
0.6X+8-X+35=9
-0.4X=9-8-35
0.4X=34
X=85
2(0.3X+4)-5(0.2X-7)=9
0.6X+8-X+35=9
-0.4X=9-8-35
-0.4X=-34
X=34/0.4
X=85
2(0.3X+4)-5(0.2X-7)=9
0.6X+8-X+35=9
8+35-9=X-0.6X
0.4X=34
X=34/0.4
X=85
2(0.3X+4)-5(0.2X-7)=9
0.6x+8-x+35=9
-0.4x=-34
x=85
*-----------------------------------------------*| 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 ||
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