Question

8) Resolva as seguintes equações:
a) x +4=10
f) 12x - 4 =10x + 3
b) x+3=3
c) x+101 = 300
g) 9-x+2 = -5x +3 + 2x
h) 3-(2x-1)=2(x+1)+3
i) 3.(x+10)-2-(x - 5)=0
d) x-279 = 237
e) 128 + x = 900
j) 47 +38 + x = 110​

Answer 1

Resposta:

A) x + 4 = 10

X = 10 - 4

X = 6

F) 12x - 4 = 10x + 3

12x - 10x = 3 + 4

2x = 7

X = 7/2

B) x + 3 = 3

X = 3 - 3

X = 0

C) x + 101 = 300

X = 300 - 101

X = 199

G) 9 - x + 2 = -5x + 3 + 2x

-x + 5x - 2x = 3 - 9 - 2

2x = - 8

X = -8/2

X = -4

H) 3-(2x - 1) = 2(x + 1) + 3

3 - 2x + 1 = 2x + 2 + 3

- 2x - 2x = 2 + 3 - 3 - 1

- 4x = 1

X = - 1/4

I) 3(x + 10) - 2 - (x - 5) = 0

3x + 30 - 2 - x + 5 = 0

3x - x = 2 - 5

2x = - 4

X = - 4 /2

X = -2

D) x - 279 = 237

X = 237 + 279

X = 516

E) 128 + x = 900

X = 900 - 128

X = 772

J) 47 + 38 + x = 110

X = 110 - 47 - 38

X = 25

Bjs!