Question

Determine o valor de x

a) 2x + 15 = -14

b) 3x + 9 = -9

c) 4x +3 = 2

d) 2x + 10 = 8

e) 5x + 15 = 9

f) 2x + 18 = 16

Answer 1

a) 2x + 15 = -14
2x = -14 -15
2x = -29
x = $\frac{-29}{2}$

b) 3x + 9 = -9 
3x = -9 -9
3x = -18
x = $\frac{-18}{3}$
x = -6

c) 4x +3 = 2
4x = 2-3
4x = -1
x = $\frac{-1}{4}$

d) 2x + 10 = 8
2x = 8 -10
2x= -2
x = $\frac{-2}{2}$
x= -1

e) 5x + 15 = 9
5x = 9 - 15
5x = -6
x = $\frac{-6}{5}$

f) 2x + 18 = 16
2x = 16 - 18
2x = -2
x = $\frac{-2}{2}$
x = -1

Answer 2

Olá!!!

Resolução!!!

a)
2x + 15 = - 14
2x = - 14 - 15
2x = - 29
x = - 29/2

S = { - 29/2 }

b)
3x + 9 = - 9
3x = - 9 - 9
3x = - 18
x = - 18/3
x = - 6

S = { - 6 }

c)
4x + 3 = 2
4x = 2 - 3
4x = - 1
x = - 1/4

S = { - 1/4 }

d)
2x + 10 = 8
2x = 8 - 10
2x = - 2
x = - 2/2
x = - 1

S = { - 1 }

e)
5x + 15 = 9
5x = 9 - 15
5x = - 6
x = - 6/5

S = { - 6/5 }

f)
2x + 18 = 16
2x = 16 - 18
2x = - 2
x = - 2/2
x = - 1

S = { - 1 }

Espero ter ajudado!!!