(5-7X)/8=(7-5X)/7-1 两边乘以56 7*(5-7X)=8*(7-5X)-56 35-49x=56-40x-56 35=9x x=35/9
(5-7X)/8=(7-5X)/7-1
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8.25X-7.5=7.5X
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6x+13.5=50+x 7.8x-1.7+1.2x=5.5
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8.25x-7.5=7.5x急…
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(5-7x)÷8=(7-5x)÷7答案 (x-1)÷2-(3+2x)=1答案
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解方程 8分之5-7x=7分之1乘(7-5x)
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6/1x(5-3/2)=?8/7x7+8/3=?
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2.5x7.8+7.4x7.8+0.78
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有7x+2x=140 9.3x+5.7x=4.5 6x+3x=180 7x-5x=16 7.8x-2.4x=1.08 5