rozwiąż równanie a) 12y-(y+5)=10y-1 b) 2(u-5)+15=3(u-4)+10 c) -3(y/3+1)-2=4(1-y) d) 2(3a-2)-6=4,5(2a-1)+1/2 Tylko z pełnym rozwiązaniem
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a) 12y - (y +5) = 10y - 1
12y - y - 5 = 10y - 1
12y - y - 10y = -1 + 5
y = 4
b) 2(u - 5) + 15 = 3(u - 4) + 10
2u - 10 + 15 = 3u - 12 + 10
2u - 3u = 10 + 10 - 12 - 15
- u = - 7 [ *(-1)
u = 7
c) - 3( y/3 + 1) - 2= 4(1 - y)
- y - 3 - 2 = 4 - 4y
- y + 4y = 4 + 3 + 2
3y = 9 [ : 3
y = 3
d) 2(3a - 2) - 6 = 4,5(2a - 1) + 1/2
6a - 4 - 6 = 9a - 4,5 + 0,5
6a - 9a = -4,5 + 0,5 + 4 + 6
- 3a = 6 [:(-3)
a= - 2