From the set {85, 91, 101}, use substitution to determine which value of x makes the equation true.
85 + x = 176
A.
none of these
B.
85
C.
91
D.
101
To determine which value of x makes the equation true, substitute each value from the set {85, 91, 101} into the equation and see if it equals 176.
For 85 + x:
85 + x = 176
x = 176 - 85
x = 91
For 91 + x:
91 + x = 176
x = 176 - 91
x = 85
For 101 + x:
101 + x = 176
x = 176 - 101
x = 75
From the set {85, 91, 101}, substituting each value, we find that x = 91 makes the equation true.
Therefore, the correct answer is C. 91