Раскрыть скобки , привести подобные слагаемые ,с объяснением
1.(3х+y)-(8x-4y)
2.(x+6y)-(8x-7y)
3.(m+n)-(m-n)
4.(m+3)-(6m+5)
5.(x-y)+(x-y)-(2x+y)
(0,2x-3)-(x-2)-(0,4x-1)
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