Question

Rozwiąż równania :

3y - (4-y) * 7 =

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

(x+2z) * 5 - 2 (z - 2x) =

-4 (x-y+z) + (-3) * (-x+y-z) =

-a + 2 (a+1) - (7-a) =

(6x-4) : 2 - (2y + 1) - (x+y) : 5 =

Answer 1

To nie są równania.

 

sprowadzamy do najprostrzej postaci:

 

3y - (4-y) * 7 = 3y - 28 + 7y = 10y - 28

(-x + 2y) - 4 (-3x + y) = -x + 2y + 12x - 4y = 11x - 2y

(x+2z) * 5 - 2 (z - 2x) = 5x + 10z - 2z +4x = 9x + 8z

-4 (x-y+z) + (-3) * (-x+y-z) = -4x + 4y - 4z + 3x - 3y + 3z = -x +y -z

-a + 2 (a+1) - (7-a) = -a+2a +2 - 7 + a = 2a -5

(6x-4) : 2 - (2y + 1) - (x+y) : 5 = 3x - 2 - 2y - 1 - x/5 - y/5 = 15x/5-x/5 -10y/5-y/5 -3 = 14x/5 - 9y/5 - 3