Question

dau coroana pls repede​

Answer 1

Raspuns: a = 10

b = 80

c = 5

Explicație: a 50-(15)

b (a+b)x2 + 2×25

c (a+b)x7 - 4×25

Answer 2

Răspuns:

a) c-(a+b)= 25 -15=10

b) 2a+2b+2c= 2×(a+b)+ 2c= 2×15+2×25=30+50=80

c) 7a+7b -4c= 7×(a+b) - 4c= 7×15 -4×25= 105 -100=5