Statement given :
→Sara says "If you subtract 11 from my number and multiply the difference by -3 , the result is -54 .
To find :
SOLUTION :
Let us take Sara's Number be “x”.
★According to Question,
→ x - 11×(-3)= -54
→ x + 33 = -54
→ x = -54-33
→ x = (-87)
let's verify our number,and check whether it's correct or not !
x - 11×(-3)= -54
Putting the value of x
(-87) - 11 × (-3)= -54
(-87) + 33 = -54
(-54) = -54
Hence, The L.H.S. = R.H.S.
Thus,our number is Verified.