Resposta :
Resposta:
A) 10 + 7 = y - 2
-y = -10 -7 -2
-y = -19 • (-1)
y = 19
B) 2.7 + a = 30
a= 30 - 14
a= 16
C) y+ 10 = 2y +11
y - 2y = 11-10
-y = 1 •(-1)
y = 1
D) 5 + 2b = 3.5
2b= 15 - 5
b= 10/2 = 5
Resposta:
A) 10 + 7 = y - 2
-y = -10 -7 -2
-y = -19 • (-1)
y = 19
B) 2.7 + a = 30
a= 30 - 14
a= 16
C) y+ 10 = 2y +11
y - 2y = 11-10
-y = 1 •(-1)
y = 1
D) 5 + 2b = 3.5
2b= 15 - 5
b= 10/2 = 5