Question

resolva as seguintes equações
a)2x=10
b)x+5=-2x+8
c)2x+5=-3x+40
d)2x (3-4)=3-2 (3x-5)
e)2 (3x+7)=-7x+8
f)20-(2x+5)=11+8x
g)17× -1 =15x+3
h)16 - x= x + 25
i)20x - 13=20 + 9x
j)15 + 24x =13x + 37
k)9 x -23=(3-27)

Answer 1

a)2x=10
x = 10/2
x = 5

b)x+5=-2x+8
x + 2x = 8 - 5
3x = 3
x = 3/3
x = 1

c)2x+5=-3x+40
2x + 3x = 40 - 5
5x = 35
x = 35/5
x = 7

d)2x (3-4)=3-2 (3x-5)
-2x = 3 - 6x + 10
6x - 2x = 20 + 3
4x = 23
x = 23/4

e)2 (3x+7)=-7x+8
6x + 14 = -7x + 8
6x + 7x = 8 - 14
13x = -6
x = -6/13

f)20-(2x+5)=11+8x
20 - 2x - 5 = 11 + 8x
20 - 5 - 11 = 8x + 2x
4 = 10x
x = 4/10
x = 2/5

g)17× -1 =15x+3
17x - 15x = 3 + 1
2x = 4
x = 4/2
x = 2

h)16 - x= x + 25
-x - x = 25 - 16
-2x = 9 .(-1)
2x = -9
x = -9/2

i)20x - 13=20 + 9x
20x - 9x = 20 + 13
11x = 33
x = 33/11
x = 3

j)15 + 24x =13x + 37
24x - 13x = 37 - 15
11x = 22
x = 22/11
x = 2

k)9 x -23=(3-27)
9x = 23 - 24
9x = -1
x = -1/9



Espero ter ajudado!!! Bons estudos!!!