7.2x-5.4x=25.2
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![7.2x-5.4x=25.2](/uploads/image/z/3755274-42-4.jpg?t=7.2x-5.4x%3D25.2)
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7.2x-5.4x=25.2
7.2x-5.4x=25.2
7.2x-5.4x=25.2
7.2x-5.4x=25.2
(7.2-5.4)x=25.2
1.8x=25.2
x=25.2÷1.8
x=14
7.2x-5.4x=25.2
5.4+5x=7.2-x
7.2x-5.4x=25.
7.2X-5.4X=12.67.2X-5.4X=12.61.8X=12.6X=7
求未知数 1.9*3-1.7*x=13.4 7.2x-5.4x=25.2 0.6*(x-0.6)=0.3 10:x=四又二分之一:0.8
5.4X+X=12.8求X
(X+X)+(X-X)+(X*X)+(X/X)=100
4X-X=25.2
5.4x-x=13.
5.4x+x=12.8
5.4x+x=12.8
3x-x=5.4
5.4x+x=1.
5.4x+x=1.
3x+x=5.4
7x-x=7.2
x-20%x=7.2
7x-x=7.2