Question

Resolva as equações:

a) y + 5 = 9

b) a + 15 = 5

c) 2 x = 16

d) 3 g - 1 = 14

e) 0 2 x + 3 = 11

f) 4 x = 20

Answer 1

a) y=9-5
y=4

b) a=5-15
a=-10

c) x=16/2
x=8

d) 3g=14+1
3g=15
g=15/3
g=5

e) 2x=11-3
2x=8
x=8/2
x=4

f) x=20/4
x=5

Answer 2

a)
y + 5 = 9
y = 9 - 5
y = 4
--------------------------
b)
a + 15 = 5
a = 5 - 15
a = - 10
----------------------------------
c)
2x = 16
x = 16/2
x = 8
--------------------------------------
d)
3.g - 1 = 14
3.g = 14 + 1
3.g = 15
g =15/3
g = 5
-------------------------------------------------
e)
 0,2.x + 3 = 11
0,2.x = 11 - 3
0,2.x = 8  . (10)
2x = 80
x = 80/2
x = 40
-----------------------------------------------

f)
4x = 20
x = 20/4
x = 5