Question

Calcule a+b sendo a= 1/3 e b= -1/5


Calcule 2x-y sendo x= 7 e y= -1/2

Answer 1

1) 1/3+(-1/5)= 5-3/15= 2/15 mmc3,5=15 2)2.7-(-1/2) 14+1/2 28+1/2= 29/2