Respuesta :

Answer:

Step-by-step explanation:

when x = 7 and y = - 2

3x + 4y

= 3 * 7 + 4 * (-2)

= 21 - 8

= 13

Hope it helps :)

Answer:

3×7+4×-2

21-8

=13

Step-by-step explanation:

the answer is 13