Answer = 0 ≤ x ≤ 25
Explanation:
Break the word equation into two for better understanding
-20 less than or equal to 2x -20 >>>> -20 ≤ 2x -20
2x -20 less than or equal to 30 >>>> 2x -20 ≤ 30
Keeping in view the question we deduce the equation
-20 ≤ 2x -20 ≤ 30
Solve and simplify the above equation accordingly, by breaking down the equation
-20 ≤ 2x -20 and 2x -20 ≤ 30
-20+20 ≤ 2x and 2x ≤ 30 +20
0 ≤ x (0/2) and x ≤ 25 (50/2)
So, 0 ≤ x ≤ 25
