(80-X+8)5-(80-X)6=4 解方程

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(80-X+8)*5-(80-X)*6=4解方程(80-X+8)*5-(80-X)*6=4解方程(80-X+8)*5-(80-X)*6=4解方程(80-X+8)*5-(80-X)*6=4400-5x+

(80-X+8)*5-(80-X)*6=4 解方程
(80-X+8)*5-(80-X)*6=4 解方程

(80-X+8)*5-(80-X)*6=4 解方程
(80-X+8)*5-(80-X)*6=4
400-5x+40-（480-6x）=4
400-5x+40-480+6x=4
x=480-400-40+4
x=44

（88-X)*5-(80-X)*6=4
440-5X-480+6X=4
-5X+6X=480-440+4
X=44

(80-x)*5-(80-x)*6+8*5=4
x-80+40=4
x=44

x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 解方程：3X+8=5X-6X （3X+2）-X=218 80+X=3（52-X） *-----------------------------------------------*| 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 || 125x(80+8)=( )x( )+( )x( ) 5*4x+x*x=80 x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? (x+7/x+6) +(x+9/x+8)=9x=(x+10/x+9) +(x+6/x+5) x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 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 (x+8)(x+6)(x+7)+(x+5)(x+6)(x+7)=(x+5)(x+8)(x+7)+(x+5)(x+8)(x+6) 4（x+5）+8x=80x=? 解x-2/5x+8=80%x-4 5(8+x)+3x=80求未知数x 80X-90X=6x+80X 解是几 4(x+5)+8x=80 80% x+6=x+1、5 (x+3)(x-4)(x+5)(x-6)+80因式分解 (x-3)(x+4)(x-5)(x+6)+80因式分解