Sagot :
A = 12-(2t+43)+4t+115
=12-2t-43+4t+115
=2t+84
B = 52t-2t+4+11-(57-2t)
=52t-2t+4+11-57+2t
= 52t-42
=12-2t-43+4t+115
=2t+84
B = 52t-2t+4+11-(57-2t)
=52t-2t+4+11-57+2t
= 52t-42
A=12-(2t+43)+4t+115
=12-2t-43+4t+115
=2t+84
B=52t-2t+4+11-(57-2t)
=52t-2t+4+11-57+2t
=52t-42
=12-2t-43+4t+115
=2t+84
B=52t-2t+4+11-(57-2t)
=52t-2t+4+11-57+2t
=52t-42