x-(x+1200)/7等于30 怎么解

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x-(x+1200)/7等于30怎么解x-(x+1200)/7等于30怎么解x-(x+1200)/7等于30怎么解x-(x+1200)/7=307x-(x+1200)=2106x=1410x=235x

x-(x+1200)/7等于30 怎么解
x-(x+1200)/7等于30 怎么解

x-(x+1200)/7等于30 怎么解
x-(x+1200)/7=30
7x-(x+1200)=210
6x=1410
x=235

x-(x+1200)/7=30
7x-x-1200=210
6x=1410
x=235

x-(x+1200)/7=30两边同乘7
7x-(x+1200)=210,6x-1200=210,6x=1410
x=235