Question

Usando os princípios aditivo e multiplicativo, determine a raiz das equações:A) x + 3 = 2B) 3y - = 13C) a - 5 = 2aD) b/2 = 3E) 2x + 3 = 13F) y - 15 = - 15G) 4z + 3 = 47H) 8 - 5y = 24 + y

Answer 1

A) x + 3 = 2 ==> x = 2-3 ==> x = - 1

B) 3y - = 13 ==> 3y = 13 ==> y = 13/3

C) a - 5 = 2a ==> 2a - a = - 5 ==> a = - 5

D) b/2 = 3 ==> b = 6

E) 2x + 3 = 13 ==> 2x = 13-3 ==> 2x = 10 ==> x = 5

F) y - 15 = -15 ==> y = - 15+ 15 ==> y = 0
G) 4z + 3 = 47 ==> 4z = 47-3 ==> 4z = 44 ==> z = 11

H) 8 - 5y = 24 + y ==> 5y+y = 8-24==> 6y= - 16 ==> y = - 16/6