Question

Vă rog îmi puteți spune cum se rezolva aceste exercitii:
2×+(×+3)=45
3×+(×-3)=65
×+(3×-7)=33

Answer 1

2x + (x+3)=45       =>            3x=45-3=42           =>                  x=42/3=14

3x + (x-3) =65      =>           4x=65+3=68          =>                  x=68/4=17

x + (3x-7) =33        =>       4x=33+7=40            =>            x=40/4=10