(2x+3)=7/9(5X一35)
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(2x+3)=7/9(5X一35)
(2x+3)=7/9(5X一35)
(2x+3)=7/9(5X一35)
(2x+3)=7/9(5X一35)
18x+27=35x-245
17x=272
x=16
(2x+3)=7/9(5X一35)
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
4(2X一9)+3(X一15)=7(X一1)一2
5x(x一3)=6一2x (x十6)2=9 5x(x一3)=6一2x
3X一(2一X)=5X
4x一3(20一x)=6x一7(9一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
已知2x一3=O,求代数式X(X²一X)十X²(5一X)一9
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
2X一3一(一5X一10)=5 (一7x+3)一(5x一3)=10 (5X一3)一(一7X十3)=2X一3一(一5X一10)=5(一7x+3)一(5x一3)=10(5X一3)一(一7X十3)=3分别怎么解?
(1)3X十6X一5=0 (2)4X一X一9=0,
(7一2X十x平方)一(5十3X一2x平方)
35(x一2)一15(5x一6)= 22x一63一21(3x一4)
35(x一2)一15(5x一6)=22x一63一21(3x一4)
5x十2x=42 15十2x一3=48 2x十3x十17=37 6x一3x=6÷5 9x一2x=15x十2x=4215十2x一3=482x十3x十17=376x一3x=6÷59x一2x=1.4十0.077(2x一6)=15.4
5分之3x一7>=2分之x-2,4分之x一12分之2x一1>6分之1一3分之x
{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=?