Question

Resolva as equações :
a- 7(2-y)=21
b- 2(8+t)=16
c- 4(6-y)=24

Answer 1

a) 7 (2 - y) = 21
14 - 7y = 21
- 7y = 21 - 14
- 7y = 7 (-1)
7y = - 7
y = - 7/7
y = - 1

b) 2 ( 8 + t) = 16
16 + 2t = 16
2t = 16 - 16
2t = 0
t = 0

c) 4 ( 6 - y) = 24
24 - 4y = 24
- 4y = 24 - 24
- 4y = 0
y = 0