(1)3.5x+x-14=18.4 (2)2.7*2-1.5x=0 (3)13x-6.8x+x=46.8 (4)17.5-0.5x=12.7 (5)5x-1.4x=54解方程,x代表未知数.并写出过程.
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![(1)3.5x+x-14=18.4 (2)2.7*2-1.5x=0 (3)13x-6.8x+x=46.8 (4)17.5-0.5x=12.7 (5)5x-1.4x=54解方程,x代表未知数.并写出过程.](/uploads/image/z/326308-4-8.jpg?t=%281%293.5x%2Bx-14%3D18.4+%282%292.7%2A2-1.5x%3D0+%283%2913x-6.8x%2Bx%3D46.8+%284%2917.5-0.5x%3D12.7+%285%295x-1.4x%3D54%E8%A7%A3%E6%96%B9%E7%A8%8B%2Cx%E4%BB%A3%E8%A1%A8%E6%9C%AA%E7%9F%A5%E6%95%B0.%E5%B9%B6%E5%86%99%E5%87%BA%E8%BF%87%E7%A8%8B.)
(1)3.5x+x-14=18.4 (2)2.7*2-1.5x=0 (3)13x-6.8x+x=46.8 (4)17.5-0.5x=12.7 (5)5x-1.4x=54解方程,x代表未知数.并写出过程.
(1)3.5x+x-14=18.4 (2)2.7*2-1.5x=0 (3)13x-6.8x+x=46.8 (4)17.5-0.5x=12.7 (5)5x-1.4x=54
解方程,x代表未知数.并写出过程.
(1)3.5x+x-14=18.4 (2)2.7*2-1.5x=0 (3)13x-6.8x+x=46.8 (4)17.5-0.5x=12.7 (5)5x-1.4x=54解方程,x代表未知数.并写出过程.
(1)3.5x+x-14=18.4
4.5x=32.4
x=7.2
(2)2.7*2-1.5x=0
1.5x=5.4
x=3.6
(3)13x-6.8x+x=46.8
7.2x=46.8
x=6.5
(4)17.5-0.5x=12.7
0.5x=4.8
x=9.6
(5)5x-1.4x=54
3.6x=54
x=15
(1)3.5x+x-14=18.4 得 4.5x=18.4+14 x = 7.2
(2)2.7*2-1.5x=0 得 1.5x = 5.4 x= 3.6
(3)13x-6.8x+x=46.8 得 7.2x = 46.8 x = 6.5
(4)17.5-0.5x=12.7 得 17.5-12.7=0.5x x = 9.6
(5)5x-1.4x=54 得 3.6x = 54 x = 15