Question

t - p = 20 t + p = 8 tem que resolver os sistema sistemas​

Answer 1

{t-p=20

+{t+p=8

$2t = 28 \\ t = \frac{28}{2} \\ t = 14$

$t + p = 8 \\ p = 8 - t \\ p = 8 - 14 \\ p = - 6$

S={14,-6)