Question

Resolva as equações
A)8b-3=5b+6
B)2y+9=10-y
C)z-7=1+2z
D)5+4a=a-3
E)9w-6=6-w
2

Answer 1

A) 8b-5b=6+3 3b=9 b=3
B) 2y+y=10-9 3y=1 y=1/3
C) -7-1=2z-z -8=z
D)4a-a=-3-5 3a=-8 a=-8/3
E)9w+w=6+6 10w= 12 w=12/10

Answer 2

a) 8b-3 = 5b+6
8b-5b = 6+3
3b = 9
b = 9/3
b= 3

b) 2y+9 = 10-y
2y+y = 10-9
3y = 1
y = 1/3

c) z-7 = 1+2z
z-2z = 1+7
-z = 8 (.-1)
z = -8

d) 5+4a= a-3
4a-a = -3-5
3a = -8
a = -8/3

e) 9w-6 = 6-w
9w+w= 6+6
10w = 12
w = 12/10 ou 6/5