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Rozwiąż równanie: a) x/3=7/6 b) x+2/4=x/5

Odpowiedź :

a) x/3 = 7/6 |•3

3•x/3 = 3•7/6

x = 7/2 = 3 1/2

b) x+2/4 = x/5 |•4

4•x+2/4 = 4•x/5

x+2 = 4x/5 |•5

5(x+2) = 5•4x/5

5x + 10 = 4x

5x-4x = -10

x = -10