Question

Resolver as seguintes equações incógnita x:
a) 5x + 10 = 13
b) 4x - 12 = 7
c) 6 + 4x = -3
d) 2 - x = 1
e) 5 = 4 - 4x

Answer 1

Explicação passo-a-passo:

a) 5x + 10 = 13

5x = 13 - 10

5x = 3

x = 3 ÷ 5

x = - 0,6

b) 4x - 12 = 7

4x = 7 + 12

4x = 19

x = 19 ÷ 4

x = 4,75

c) 6 + 4x = - 3

4x = - 3 - 6

4x = 9

x = 9 ÷ 4

x = 2,25

d) 2 - x = 1

- x = 1 - 2

x = 1

e) 5 = 4 - 4x

5 - 4 = - 4x

1 = - 4x

x = 1/-4

Answer 2

a) 5x+10=13

5x= 13-10

5x=3

x=3/5

b) 4x-12=7

4x=7+12

4x=19

x=19/4

c) 6+4x=-3

4x=-3-6

4x= -9

x=-9/4

d) 2-x=1

-x=1-2

-x=-1 .(-1)

x=1

e)5=4-4x

4-4x=5

-4x=5-4

-4x =1

x= 1/-4