Упростите выражения:
1)-1,5a×(-6b)
2)-4m-15n+3m+18n
3)b+(7-b)-(14-b)
4)-2(x-3)+4(x-1)
1)-1,5a×(-6b)
2)-4m-15n+3m+18n
3)b+(7-b)-(14-b)
4)-2(x-3)+4(x-1)
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Answers & Comments
2)m(-4+3)-3n(5+6)=-m-33n
3)b+7-b-14+b=b-7
4)-2x+6+4x-4=2x+2=2(x+1)