Answer:
Equations such as x + 3 = 7 are first-degree equations, since the variable has an exponent of 1. ... Solution We substitute the value 3 for x in the equation and see if the ... Although we can see by inspection that the solution is 9, because -(9) = -9, we can avoid ... Solution We can solve for t by substituting 24 for d and 3 for r.
Step-by-step explanation:
