Question

10y-5(1-y)=3(2y-2)-20

Answer 1

10y -5 (1-y) = 3 (2y -2) -20
10y -5 +5y = +6y -6 -20
10y +5y  -6y = +5 -6 -20
+15y -6y = -1 -20 
+9y = -19
y = -19
       9
y = 2,1

Answer 2

Resposta:

$y=-\frac{7}{3}$

Explicação passo-a-passo:

$10y -5(1-y)=3(2y-2)-20\\10y-5+5y=6y-6-20\\15y-5=6y-26\\15y-6y=-26+5\\9y=-21\\y=-\frac{21^{\div3}}{9^{\div3}} \\\\\boxed{y=-\frac{7}{3} }$