几道未知数的题!5X*3=7X+96 4X*3+6=8X+30 X-15+X+5+0.5X+3X=265
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几道未知数的题!
5X*3=7X+96 4X*3+6=8X+30 X-15+X+5+0.5X+3X=265
5X*3=7X+96 4X*3+6=8X+30 X-15+X+5+0.5X+3X=265
![几道未知数的题!5X*3=7X+96 4X*3+6=8X+30 X-15+X+5+0.5X+3X=265](/uploads/image/z/61381-37-1.jpg?t=%E5%87%A0%E9%81%93%E6%9C%AA%E7%9F%A5%E6%95%B0%E7%9A%84%E9%A2%98%215X%2A3%3D7X%2B96+4X%2A3%2B6%3D8X%2B30+X-15%2BX%2B5%2B0.5X%2B3X%3D265)
(1)5X*3=7X+96
15x=7x+96
15x-7x=96
8x=96
x=12
(2)4X*3+6=8X+30
12x+6=8X+30
12x-8x=30-6
4x=24
x=6
(3) X-15+X+5+0.5X+3X=265
x+x+0.5x+3x=265+15-5
5.5x=275
x=50
供参考,
15x=7x+96
15x-7x=96
8x=96
x=12
(2)4X*3+6=8X+30
12x+6=8X+30
12x-8x=30-6
4x=24
x=6
(3) X-15+X+5+0.5X+3X=265
x+x+0.5x+3x=265+15-5
5.5x=275
x=50
供参考,
几道未知数的题!5X*3=7X+96 4X*3+6=8X+30 X-15+X+5+0.5X+3X=265
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