1)(3х + у) – (-х -4у) = 3х + у + х + 4у = 4х + 5у 2)( х + 6у) – (8х – 7у) = х + 6у – 8х + 7у= - 7х + 13у = 13у – 7х
3)(m + n) – ( m – n ) = m +n – m +n = 2n
4)(m + 3) – ( 6m + 5) – (m - 1) = m +3 – 6m – 5 – m + 1 = -6m – 1
5) ( x - y ) + (x + y) - ( 2x + y) = x – y + x + y - 2x + y = y
6)(0.2x -3) – (x - 2) – (0.4x - 1) = 0.2x -3 – x + 2 – 0.4x + 1 = -1.2x

Раскройте скобки.

mariya191215    3   14.12.2020 09:23    0