Question

obtenha a solução de cada equação letra a)2x = 16 b)y+5=9 c)3z-1=14 d)7=19-2x e)10-4y=y f)3-z=5z-15

Answer 1

2x= 16 
x= 16/2
x = 8
________
 y+5 =9
y = 9-5
y = 4
_________
3z - 1 =14
3z = 14+1
3z = 15
z = 15/3
z= 5
___________
7=19-2x
7-19 = - 2x
- 12 = -2 x
-12 = - 2  x (- 1 ) para fica positivo, multiplicamos por -1
12 = 2x 
12/2 = x
6= x
_________
10 - 4y= y 
10 = y +4y
10 = 5y
10/5 = y
2 = y
_____________
3-z = 5z - 15
-z -5z = - 15 - 3
-6z = - 18
-6z= -18 ( - 1 )
6z = 18
z = 18/ 6 
z = 3

Answer 2

a) 2x= 16
x=16/2=8

b)y+5=9
y=9-5 = 4

c) 3z-1=14
3z=14-1
3z=13
z=13/3

d)7=19-2x
2x=19-7
2x=12
x=12/2
x=6

e)10-4y=y
10=y5
y=10/5=2

f)3-z=5z-15
5z-z=15+3
4z=18
z=18/4
z=9/2