Question

Trzeba opuścić nawiasy i zredukować wyrazy podobne.
daje najjj​

Answer 1

- (x + 7y) - (-3x - 9y) = -x - 7y + 3x + 9y = 2x +2y

(5x + 3y) + (-3x + 9y) = 5x + 3y -3x + 9y = 2x + 12y

- (-6x - 2y) + (-4x - 4y) = 6x + 2y -4x - 4y = 2x -2y

(-8x + 4y) - (3y - x) = -8x + 4y - 3y + x = -7x + y