Question

Resolva as equações a seguir :
a)13× + 26 = 390
b)7y + 21= 63
c)22× + 66 = 242

Answer 1

Resposta:

A) 13x=390-26

13×= 364

x=364/13

x= 28

B) 7y= 63-21

7y= 42

y= 42/7

y= 6

C) 22x= 242 -66

22x= 176

x= 176/22

x= 8