Odpowiedź:
x-56/56 = 12/48
x-56/56 = 1/4
4 (x-56) = 56
x-56 = 14
x = 14+56
x=70
10/10+x = 8/8+11
10/10+x = 8/19
190 = 80 +8x
-8 = -110
x = 55/4