Question

6) Hallar el valor de x
a) x + 7 = 10 b) 3x - 5 = 10
e) 3(x + 2) - 4 + 11x = 4(2x + 5)
h) x - 2 = 7
i) 2x2 - 5 = 13.​

Answer 1

hay que dejar sola a la x

a) x + 7 = 10

x = 10-7

x = 3

b)  3x - 5 = 10

3x = 10 +5

3x = 15

x = 15/3  

x = 5

e) 3(x + 2) - 4 + 11x = 4(2x + 5)

3x + 6 - 4 + 11x = 8x + 20

6x = 18

x = 18/6

x = 3

h)  x - 2 = 7

x = 7 + 2

x = 9

i) 2x2 - 5 = 13.​

4x - 5 = 13

4x = 13+ 5

4x = 18

x= 18/4

x = 9/2