Question

resolva:
2 x =16
y + 5 =9
3 z-1 =14
7 = 19 - 2 x
10 - 4 y =y
3 - z =5 z -5

Answer 1

2x =16
x = 16/2
x = 8

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y + 5 =9
y = 9 - 5
y = 4

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3 z - 1 =14
3z = 14 + 1
3z = 15
z = 15/3
z = 5

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7 = 19 - 2 x
7 - 19 = - 2x
- 12 = - 2x  (-1)
12 = 2x
2x = 12
x = 12/2
x = 6

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10 - 4y = y
10 = y + 4y
10 = 5y
5y = 10
y =10/5
y = 2

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3 - z = 5z - 5
3 + 5 = 5z + z
8 = 6z
6z = 8
z =   8   (:2)
       -----
        6   (:2)

z =    4
        ----
          3

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