Resposta :
Resposta:
11) y - 6 = 12
y = 12 + 6
y = 18
12) 3y = 15
y = 15/3
y = 5
13) 5y = 35
y = 35/5
y = 7
14) 3y = 33
y = 33/3
y = 11
15) 6x = 36
x = 36/6
x = 6
16) 14y = 28
y = 28/14
y = 2
17) -x + 7 = 10
-x = 10 - 7
-x = 3
x = -3/1
x = -3
18) 4k = 20
k = 20/4
k = 5
19) 10a - 15 = 45
10a = 45 + 15
10a = 60
a = 60/10
a = 6
20) 25y - 2 = 48
25y = 48 + 2
25y = 50
y = 50/25
y = 2