Respuesta :

A:

4y + 3 = 19

Y = 3

B:

n = 16

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a. 4y + 3 = 19
3+4y=19
3 + -3 + 4y = 19 + -3
3 + -3 = 0
0 + 4y = 19 + -3
4y= 19 + -3
19 + -3 = 16
4y = 16
y = 4