Răspuns:[12+3*(16/f/4)*3]/7=1*3[12+3*(16/f/4)*3]/7 = 312+3*(16/f/4)*3 = 3*712+3*(16/f/4)*3 = 213*(16/f/4)*3 = 21-123*(16/f/4)*3 = 93*(16/f/4) = 9/33*(16/f/4) = 316/f/4 = 3/316/f/4 = 116/f = 1*416/f = 4f = 16/4f = 4
Explicație pas cu pas: