Question

1o) Encontre o valor de x em cada equação do 1o grau abaixo:
a) x+7=11 b) x – 2 = 8
c) 7 – x = 4
d) 5x + 3 = 13 e)x +3=-10 f) 2x – 1 = 15 g)4x+3= 7 h) 5 + x = 3
i) x + 13 = 16 j) 3x + 4 = 19

Answer 1

a) x + 7 = 11

X = 11 - 7

X = 4

Resp: X= 4

b) x – 2 = 8

X= 8 + 2

X= 10

Resp: X= 10

c) 7 – x = 4

-X = 4 - 7

-X = -3

Resp: X = +3

d) 5x + 3 = 13

5x = 13 - 3

5x = 10

X= 10/5

X= 2

Resp: X = 2

e)x +3=-10

X = -10 -3

X= -13

Resp: X= -13

f) 2x – 1 = 15

2x = 15 + 1

2x = 16

X= 16/2

X= 8

Resp: X = 8

g)4x+3= 7

4x = 7 - 3

4x = 4

X= 4/4

X= 1

Resp: X = 1

h) 5 + x = 3

X = 3 - 5

X= -2

Resp: X = -2

i) x + 13 = 16

X = 16 - 13

X= 3

Resp: X = 3

j) 3x + 4 = 19

3x = 19 - 4

3x = 15

X= 15 / 3

X= 5

Resp: X= 5

(espero ter ajudado <3)