а) -3(4-5a) = -12 + 15a
б) 18 - 4c(3 + 2a) = 18 - 12c - 8ac
в) 4(3x - 2) - 2(-5y - 1) = 12x - 8 + 10y + 2
г) -6a(-x + 7) + x(3 - y) = 6ax - 42a + 3x - xy
д) -8(2 - 2y) + 4(3 - 4y) = -16 + 16y + 12 - 16y = -4
е) 7x - 0.5(-2x + 4) - (10 - x) = 7x + x - 2 + 10 - x = 7x + x + 10 - 2 - x = 7x + 10
а) -3(4-5a) = -12 + 15a
б) 18 - 4c(3 + 2a) = 18 - 12c - 8ac
в) 4(3x - 2) - 2(-5y - 1) = 12x - 8 + 10y + 2
г) -6a(-x + 7) + x(3 - y) = 6ax - 42a + 3x - xy
д) -8(2 - 2y) + 4(3 - 4y) = -16 + 16y + 12 - 16y = -4
е) 7x - 0.5(-2x + 4) - (10 - x) = 7x + x - 2 + 10 - x = 7x + x + 10 - 2 - x = 7x + 10