Question

Calcule a soma do dobro de - 10 com o triplo de - 15

Answer 1

2•(-10)+3•(-15)=
=(-20)+(-45)=
=(-65)

Answer 2

dobro: x 2
triplo: x 3
Logo:
(-10 x 2) + (-15 x 3)
(-20)+(-45)
-20-45:
-65