8+5x=100 0.273除x=0.35 25-0.25x=15 4.2x+2.8x=148+5x=100 0.273除x=0.3525-0.25x=154.2x+2.8x=14
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8+5x=1000.273除x=0.3525-0.25x=154.2x+2.8x=148+5x=1000.273除x=0.3525-0.25x=154.2x+2.8x=148+5x=1000.273除
8+5x=100 0.273除x=0.35 25-0.25x=15 4.2x+2.8x=148+5x=100 0.273除x=0.3525-0.25x=154.2x+2.8x=14
8+5x=100 0.273除x=0.35 25-0.25x=15 4.2x+2.8x=14
8+5x=100
0.273除x=0.35
25-0.25x=15
4.2x+2.8x=14
8+5x=100 0.273除x=0.35 25-0.25x=15 4.2x+2.8x=148+5x=100 0.273除x=0.3525-0.25x=154.2x+2.8x=14
8 + 5x = 100
5x = 100 - 8
5x = 92
x = 18.4
0.273÷ x = 0.35
0.35x = 0.273
x = 0.78
25 - 0.25x = 15
0.25x = 15 - 25
0.25x = 10
x = 40
4.2x + 2.8x = 14
7x = 14
x = 2
未知数是哪个?
收起
8+5x=100 0.273除x=0.35 25-0.25x=15 4.2x+2.8x=148+5x=100 0.273除x=0.3525-0.25x=154.2x+2.8x=14
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