Question

Resolva as equações
A) 7y +5 -y + 8=31

B)5(3 - 2a)=55

C) 12 + (3x + 6) . (-7) -5 =70


D)16x +2(7x + 8) -9 =67

Answer 1

A)
7y+ 5-y + 8 = 31
7y + 5-y = 23
7y - y = 18
6y = 18
Y = 18/6
Y= 3
B) 15 -10a =55
-10a= 40
a = -4