260x=200X(x+6)

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260x=200X(x+6)
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260x=200X(x+6)
260x=200X(x+6)

260x=200X(x+6)
260x=200*(x+6)
260x=200x+200*6
260x-200x=1200
60x=1200
x=20

260x=200X(x+6)
260x=200x+1200
260x-200x=1200
60x=1200
x=1200/60
x=20

260x=200x+200X6
260x-200x=1200
60x=1200
x=20
还有问题吗,可以随时问我,你应该是小学的吧,对我来说没问题

-6 或0

260x=200*(x+6)
260x=200x+200*6
260x-200x=1200
x=20