Question

помогите пожалуйста с математикой

Answer 1

694.
$1)3x + y + x + 4y = 4x + 5y \ 2)x + 6y - 8x + 7y = - 7x + 13y$
$3)m + n - m + n = 2n$
$4)m + 3 - 6m - 5 - m + 1 = \ - 6m - 1$
$5)x - y + x + y - 2x - y = \ - y$
$6)0.2x - 3 - x + 2 - 0.4x + 1 = \ - 1.2x$
695.
$1)3a - 3b - 2a - 2b = \ a - 5b$
$2)4x + 4y + 10x - 5y = \ 14x - y$
$3)2.4c - 7.2d - 2.6c + 1.3d = \ - 0.2c - 5.9d$
$4) - frac{1}{4} m - frac{3}{4} n- frac{3}{4} m - frac{1}{4} n = \ - m - n$
696.
$3.5a + 7 + 1.5a - 9 = \ 5a - 2 = 5 times ( - 0.8) - 2 = \ - 4 - 2 = - 6$
$2)10.5 - 14b - 5.7 + 8b = \ 4.8 - 6b = 4.8 - 6 times 1.3 = \ 4.8 - 7.8 = - 3$
$3) - 4c - 6 + 7c + 5 = \ 3c - 1 = 3 times 7 - 1 = 20$