Zad1.Rozwiąż równanie i zrób sprawdzenie f) 3(1 - x) - (1 - 2x) = 9g) 0,5 (2 - 4x) = 3 - xh) 12y - (y + 5) = 10y - 1i) 2 (3a - 2) - 6 = 4,5 (2a - 1) + jedna druga
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f) 3(1 - x) - (1 - 2x) = 9
3-3x-1+2x=9
-3x+2x=9-3+1
-1x=7 /-1
x=-7
g) 0,5 (2 - 4x) = 3 - x
0,25-2x=3-x
-2x+x=3-0,25
-1x=2,75
h) 12y - (y + 5) = 10y - 1
12y-y-5=10y-1
12y-y-10y=-1+5
y=4
i) 2 (3a - 2) - 6 = 4,5 (2a - 1) + 1/2
6a-4-6=9a-4,5+1/2
6a-9a=-4,5+1/2+4+6
-3a=6 /-3
a=-2