Question

determine o valor do x na equações do 1 grau
a)3x+2=4x+9
b)14-3x=79+2x
c)2x-24=5x-45
d)4x-9=6x-43
e)6x-24=21-9x
f )3x+4=+9x-26

Answer 1

a)3x+2=4x+9
3x - 4x= 9 -2
-x= 7
x = -7

b)14-3x=79+2x
-3x-2x= 79 -14
-5x = 65
x= 65 / - 5
x= - 13

c)2x-24=5x-45
 2x-5x = -45 + 24
 -3x = - 21
 x= -21/-3 
 x= 7

d)4x-9=6x-43
4x-6x = -43 + 9
 - 2x = - 34
 x= -34/-2
 x= 17

e)6x-24=21-9x
6x+9x = 21 + 24
15x= 45
x= 45/15
x= 3

f )3x+4=+9x-26
3x-9x =  -26 -4
-6x = - 30
x= 5

Answer 2

a)-7 = 1x
x = -7

b)-1x = 65 . (-1)
x = - 65

c)-3x = 21 . (-1)
x = -7

d)-2x = -34 . (-1)
x = 17

e)15x = 45
x = 3

f)-6x = -30 . (-1)
x = 5