7x+2x=4.5
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7x+2x=4.57x+2x=4.57x+2x=4.57x+2x=4.5(7+2)x=4.59x=4.5x=4.5÷9x=0.59X=4.5X=0.50.5X=0.59x=4.5x=0.5x=0.5
7x+2x=4.5
7x+2x=4.5
7x+2x=4.5
7x + 2x = 4.5
(7 + 2)x = 4.5
9x = 4.5
x = 4.5÷9
x= 0.5
9X=4.5
X=0.5
0.5
X=0.5
9x=4.5 x=0.5
x=0.5
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
2x+3x+4x+5x+x+6x+7x=100
9x+7x-x=4.5
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
7x+2x=4.5
(x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8
21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272
*-----------------------------------------------*| 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
7x^2-5x=2x^2+x
x-2/3x+x+2/7x=30
27046=2x( )+7x( )+4x( )+6x( )
47026=4x()+7x()+2x()+6x()
2706=2x( )+7x( )+4x( )+6x( )
(x+7)(x+6)-(x-2)(x+1)=?