Rozwiąż równania podane w postaci proporcji: Aby dokładnie! i rozpiac prosze a) x/2 = 5/6
b) x/2 = (x+1)/4
c) 2(x-1)/3 = (x+2)/5
d) (x-1) / (x+3) = x / (x+1)
e) (2a+1)/2a = b / (b-1)
f) (b-2) / (b+1) = b / (b-3)
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a) 6x=2*5
6x=10
x=10/6
b) 4x=2(x+1)
4x=2x+2
2x=2
x=1
c) 2*5(x-1)=3(x+2)
10x-10=3x+6
13x=16
x=16/13
d) (x-1)(x+1)=x(x+3)
x^2-1=x^2+3x
3x=-1
x=-1/3
e) (b-1)(2a+1)=2ab
2ab+b-2a-1=2ab
b-2a=1
b=2a+1
f) (b-2)(b-3)=b(b+1)
b^2-3b-2b+6=b^2+b
-5b+6=b
6b=6
b=1