Question

determine o numero real "a" que torna as ecpressoes 3a+8 e a+12 iguais

Answer 1

3a+8=a+12
3a-a=12-8
2a=4
a=4/2
a=2

Answer 2

3a+ 8 = a +12
3a-a = 12-8
2a= 4
a= 4/2
a= 2