Question

resolva as seguintes equações I) 10 = X + 9

J) 15 = X + 20


L) 4 = X - 10


M) 7 = X + 8

N)0 = X + 12


O) - 3 = X + 10​

Answer 1

Resposta:

l) 10 = x + 9

-x = 10-9

-x = 1 |×(-1)

x = -1

j) 15 = x + 20

-x = 20-15

-x = 5×(-1)

x= -5

L) 4 = x - 10

-x = -10-4

-x = -14 |×(-1)

x = 14

M) 7 = x + 8

-x = 8-7

-x = 1 |(-1)

x = -1

N) 0 = x + 12

-x = 12-0

-x = 12|×(-1)

x = -12

O) -3 = X + 10

-X = 10+3

-x = 13 |×(-1)

x = -13

Answer 2

Resposta:

I) 10 = X + 9

$10 - x - 9 = 0 \\ 1 - x = 0 \\ - x = - 1 \times ( - 1) \\ x = 1$

J) 15 = X + 20

$15 - x - 20 = 0 \\ - 15 - x = 0 \\ - x = 15 \times ( - 1) \\ x = - 15$

L) 4 = X - 10

$4 - x + 10 = 0 \\ 14 - x = 0 \\ - x = - 14 \times ( - 1) \\ x = 14$

M) 7 = X + 8

$7 - x - 8 = 0 \\ - 1 - x = 0 \\ - x = 1 \times ( - 1) \\ x = - 1$

N)0 = X + 12

$- x - 12 = 0 \\ - x = 12 \times ( - 1) \\ x = - 12$

O) - 3 = X + 10

$- 3 - x - 10 = 0 \\ - 13 - x = 0 \\ - x = 13 \times ( - 1) \\ x = - 13$