Question

QUESTÃO 2- Resolva as seguintes equações:
a) X-3=7
e) 6x-10=2x+14
b) x-279=237
f) 7x-1=13
c) 3x=12
g) 2(x-1)-7=17
d) 35x5-105
h) 7(x-3)=5(X+3)​

Answer 1

Explicação passo-a-passo:

a) x -3= 7

x= 7 + 3

x = 10

e) 6x -10 = 2x +14

6x -2x = 14 + 10

4x = 24

x =24/4

x =6

b) x - 279 = 237

x = 237 + 279

x = 516

f) 7x - 1 = 13

7x = 13 + 1

7x = 14

x = 14/7

x = 2

c) 3x = 12

x = 12/3

x = 4

g) 2 (x -1) -7 = 17

2x -2 -7 = 17

2x = 17 + 2 + 7

2x = 26

x = 26/2

x = 13

h) 7 ( x- 3) = 5 ( x + 3)

7x -21 = 5x + 15

7x - 5x = 15 + 21

2x = 36

x = 36/2

x = 18