Решите примеры:
а)12а-(b-2а)
б)(2х+3у)-(х-2у)
в)5b+(-b-5)
г)(3х-5у)+(-3х+у)
а)12а-(b-2а)
б)(2х+3у)-(х-2у)
в)5b+(-b-5)
г)(3х-5у)+(-3х+у)
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Answers & Comments
б)......=2x+3y-x+2y=x+5y
в)......=5b-b-5=4b-5
Г)......=3x-5y-3x+y= -4y