Răspuns :
5/6 × 258 = 5 × 43 = 215
79 + (79-8) + x = 215
79 + 71 + x = 215
150 + x = 215
x = 215 - 150
x = 65 m
79 + (79-8) + x = 215
79 + 71 + x = 215
150 + x = 215
x = 215 - 150
x = 65 m