Question

solve by trial and error 11 + 2n= 19​

Answer 1

Answer:

Putting\quad =0

11+2x=19

11+(2×0)=0

It is not true.

Putting\quad x=1

11+2x=19

11+(2×1)=13

It is not true.

Putting\quad x=2

11+2x=19

11+(2×2)=15

It is not true.

Putting\quad x=3

11+2x=19

11+(2×3)=17

It is not true.

Putting\quad x=4

11+2x=19

11+(2×4)=19

Its a true solution.

Answer 2

Answer:

2n=19-11

n=8/2

=4

thus n is 4 units