Răspuns :
//_____a______//_______b______//________b_______//
a + b +c = 448
//______a_____//......x........//
a + x = 54;
//_______b______//.......x.......//
b + x = 136;
//________c_________//.......x........//
c + x = 285;
a = 54 -x;
b = 136 - x;
c = 285 - x;
(54 -x) + (136 -x) + (285 -x) = 448;
3x = 54 + 136 + 285 - 448;
3x = 27;
x = 27:3;
x = 9;
a = 54 -9;
a = 45;
b = 136 - 9,
b = 127;
c = 285 -9;
c = 276.
a + b +c = 448
//______a_____//......x........//
a + x = 54;
//_______b______//.......x.......//
b + x = 136;
//________c_________//.......x........//
c + x = 285;
a = 54 -x;
b = 136 - x;
c = 285 - x;
(54 -x) + (136 -x) + (285 -x) = 448;
3x = 54 + 136 + 285 - 448;
3x = 27;
x = 27:3;
x = 9;
a = 54 -9;
a = 45;
b = 136 - 9,
b = 127;
c = 285 -9;
c = 276.