Question

Даю 40 баллов. Помогите​

Answer 1

$m - ( - 2 + n + k) = m + 2 + n + k$

$a + 4.6 + a + 1.4 = 2a + 6$

$2.5y - 8.3 \times ( - 5y) + 4.5x = 2.5y + 41.5y + 4.5x = 44y + 4.5x$

$2b + 7.2 - b + 2.8 = b + 10$

$- 2(5a - 3b) + a = - 10a + 6b + a = 6b - 9a$

$(2.9x - 0.5y) - (2.9x - 1.5y) = 2.9x - 0.5y - 2.9x + 1.5y = y$

$(4x - 8y) - (5x - 12y) = 4x - 8y - 5x + 12y = 4y - x$

$- 1.4(0.2a - 0.3b) + 1.8a = - 2.8a + 0.3b + 1.8a = 0.3b - a$

$\frac{1}{2} ( - 6.2a - 1.6b) + b = - 3.1a - 0.8b + b = 0.2b - 3.1a$

$(2.9x - 0.5y) + (2.9x + 1.5y) = 2.9x - 0.5y + 2.9x + 1.5y = 5.8x + y$

$(4x - 8y) - (5x - 12y) = 4x - 8y - 5x + 12y = 4y - x$

$(3x + y) - (x - 4y) = 3x + y - x + 4y = 2x + 5y$

$(x + 6y) - (8x - 7) = x + 6y - 8x + 7 = 6y - 7x + 7$

$(m + n) - (m - n) = m + n - m + n = 2n$

$(m + 3) - (6m + 5) = m + 3 - 6m - 5 = - 5m - 2$

$(x - y) + (x - y) = x - y + x - y = 2x - 2y$