To make the equation \(4x + 10 = ax + b\) have infinite solutions, both sides of the equation must be equivalent. This means the coefficients of \(x\) and the constant terms must be equal.
Starting from: \[ 4x + 10 = ax + b \]
For the coefficients of \(x\): \[ 4 = a \]
For the constant terms: \[ 10 = b \]
Thus, substituting these values into the equation, we have: \[ 4x + 10 = 4x + 10 \]
So, the completed equation is: \[ 4x + 10 = 4x + 10 \]
This will have infinite solutions since both sides of the equation are identical.