Question

ajutor


(a+20)+375=500;(a-300)+125=375

Answer 1

$a).(a+20)+375=500 \\ a+20=500-375 \\ a+20=125 \\ a=125-20 \\ a=105 \\ b).(a-300)+125=375 \\ a-300=375-125 \\ a-300=250 \\ a=250+300 \\ a=550$

Answer 2

(a + 20) + 375 = 500
a + 20 = 500 - 375
a = 125 - 20
a = 105

(a - 300) + 125 = 375
a - 300 = 375 - 125
a = 250 + 300
a = 550