Question

9x-_=-21 has the solution -2

Answer 1

Answer:

let 9x =9×-2 =-18

then -18 -2 =-21

therefore the solution is -2

hence its solved

Answer 2

Answer:

Step-by-step explanation:

x=-2

let __=y

9(-2)-y=-21

-18-y=-21

-y= -21+18

-y= -3

y= 3

therefore 3 is the answer