Question

Resolva as equações em R
c)10y-5(1+y)=3(2y-2)-20

Answer 1

10y-5-y = 6y-6-20
10y-y-6y = -20+5
3y = -15
y = -15/3
y = -5

Answer 2

10y-5-5y= 6y-6-20
10y-5y-6y= -6-20+5
-y = -21 ---- x( - 1 )
y = 21