Answer:
Explanation:
The equation 3x + 7 = 9 is a linear equation in one variable, x. To determine the type of solution, we need to solve the equation and analyze the result.
Subtracting 7 from both sides of the equation, we have:
3x + 7 - 7 = 9 - 7
Simplifying:
3x = 2
Dividing both sides of the equation by 3:
(3x)/3 = 2/3
Simplifying:
x = 2/3
The solution to the equation is x = 2/3.
In this case, the equation has a single solution, so we can say that it has a unique solution or a one-to-one correspondence.