Question

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

Answer 1

1)-1.5(а*3b)
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)

Answer 2

1. -1.5a × (-6b) = 9ab

2. -4m - 15n + 3m + 18n = -m + 3n

3. b + (7 - b) - (14 - b) = b + 7 - b - 14 + b = 7 - 14 + b + b - b = -7 + b

4. -2(x - 3) + 4(x - 1) = -2x + 6 + 4x - 4 = 2x + 2