Which of the following answers gives the best estimate for x given the following equation?
21x+1,998=2,243
(1 point)
Responses
100
100
10
10
1
1
1,000
To find the best estimate for x, we need to isolate x on one side of the equation.
Subtracting 1,998 from both sides, we get:
21x = 2,243 - 1,998
21x = 245
Dividing both sides by 21, we find:
x = 245 / 21
x ≈ 11.67
Therefore, the best estimate for x is 12.
None of the given options - 100, 10, 1, or 1,000 - is the best estimate for x.