Rozwiążcie mi te równania:
3.
a) (4 - 2x) - (x + 3) = (x - 5) + (-3 - x)
b) (3 - 2x) - (3x + 4) = - (3 - 2x) + (5x + 4)
18.
a) (x - 3) (5 - x) - 2 = (2 - x) (x - 4) + 3
b) (6 - x) (x + 2) + (x + 3) (x - 4) = 2x + 5
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3.
a)
4-2x-x-3=x-5-3-x
4-3x=-8
-3x=-12 //-3
x=4
b)
3-2x-3x-4=-3+2x+5x+4
-1-5x=7x+1
-12x=2 //-12
x=-1/6
18
a)
5x-15-x^2 +3x-2=2x-8-x^2+4x+3
8x-17=6x-5
2x=12 //2
x=6
b)
6x+12-x^2-2x+x^2- 4x+3x-12=2x+5
3x=2x+5
x=5