Question

Caucule a raiz quadrada de cada equação.
a) 2x=16
b) y+5=9
c) 3z-1=14
d) 7=19-2x
e)10-4y=y.

Answer 1

a)
2x = 16
x = 16/2
x = 8


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

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c)
3z - 1 = 14
3z = 14 + 1
3z = 15
z = 15/3
z = 5


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

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
e)
10 - 4y = y
10 = y + 4y
10 = 5y
5y = 10
y = 10/5
y = 2

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨

Answer 2

a) 2x = 16

x = 16

      2

x = 8

b)  y+5=9

y = 9-5

y = 4

c) 3z-1=14

3z = 14- 1

3z = 13

z = 13

      3

z = 4,33

d) 7=19-2x

2x = 19 - 7

2x = 12

x = 12

     2

x= 6

e)

10-4y=y

- 4y - y = -10 .(-1)

5y = 10

y = 10

      5

y = 2