Раскройте скобки и упростите выражение
2x-(3+4x)+(5-7x)+3x
3m+(-1-m)-(6m-4)-m
3n-(8n-12)+6n-(9n-7)
2x-(3+4x)+(5-7x)+3x
3m+(-1-m)-(6m-4)-m
3n-(8n-12)+6n-(9n-7)
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Answers & Comments
3m-1-m-6m+4-m = -5m+3
3n-8n+12+6n-9n+7 = -8n+19
Я опоздал
Но это не точно