Question

resolver as equações
a.-x=9
b.-7x=14
c.15=-3x
d.-5x=15
e.6x=2x+16
f.2x+3=x+4
g.4x-7=8x-2

Answer 1

a) -x=9 x=9
b)
-7x=14 x= 14÷(-7) x=-2
c)
15= -3x
15÷(-3)=x
x= -5

d)
-5x=15
x= 15÷(-15)
x= -1

e)
6x=2x+16
6x-2x=16
4x=16
x= 16÷4
x= 4

f)
4x-7=8x-2
4x-8x=-2+7
-4x=5
x= -5/4

Answer 2

a.-x=9 (-1)

x= - 9

b.-7x=14

x=14/-7

x= - 2

c.15=-3x

x= 15/-3

x= - 5

d.-5x=15

x= 15/- 5

x= - 3

e.6x=2x+16

6x - 2x = 16

4x = 16

x= 16/4

x= 4

f.2x+3=x+4

2x - x= 4 - 3

x= 1

g.4x-7=8x-2

4x - 8x = - 2 + 7

- 4x = 5 (-1)

4x = - 5

x= - 5/4