А) (2у+z)-(z-2y) = 2у + z - z + 2y = 4y
Б) (х+3)-(5x-7) = x + 3 - 5x + 7 = -4x + 10
B) (2a-1)+(3-4) = 2a - 1 + 3 - 4 = 2a - 2
Г) (а+b)-(a-b)-(b-a) = a + b - a + b + a = 2b
D) 3m-(2m-3)+(2-m) = 3m - 2m + 3 + 2 - m = m + 5
E) (3y-1)-(2y-2)+(y-3) = 3y - 1 - 2y + 2 + y - 3 = 2y - 2
А) (2у+z)-(z-2y) = 2у + z - z + 2y = 4y
Б) (х+3)-(5x-7) = x + 3 - 5x + 7 = -4x + 10
B) (2a-1)+(3-4) = 2a - 1 + 3 - 4 = 2a - 2
Г) (а+b)-(a-b)-(b-a) = a + b - a + b + a = 2b
D) 3m-(2m-3)+(2-m) = 3m - 2m + 3 + 2 - m = m + 5
E) (3y-1)-(2y-2)+(y-3) = 3y - 1 - 2y + 2 + y - 3 = 2y - 2