Question

Resolva as equações a seguir :
a = 7 (y - 1) = 2 (3 y + 1)
b = y + 4 (y - 1 ) = 9 - 2 (y + 3 )
c = 4 (y - 2 ) + 3 (2 y - 1 ) = 6 ( 2 y - 3 )
d = 2 - a / 10 + a - 5 / 8 = 1 / 2
e = 3 y / 2 - y - 5 / 3 = 1 + 2 y - 4 /4

Answer 1

a)7(y-1)=2(3y-1)
7y-7=6y-2
7y-6y= -2+7.
y=5

b)y+4(y-1)=9-2(y+3)
y+4y-4=9-2y-6
5y-4=9-2y-6
5y+2y=9-6+4
7y=7
y=7

c)4(y-2)+3(2y-1)=6(2y-3)
4y-8+6y-3=12y-18
4y+6y-12y=-18+8+3
10y-12y=-10+3
-2y=7. × (-1)
y=3,5