Consider the system of equations shown below to answer questions {6x-3y=18 and -3x -9y =-93
The value of x will be
A -3
B 7
C 8
D 18
To solve this system of equations, we can use the method of substitution or elimination. Let's use the elimination method to find the value of x.
6x - 3y = 18
-3x - 9y = -93
To eliminate y, let's multiply the first equation by 3 and the second equation by -1:
18x - 9y = 54
3x + 9y = 93
Adding the two equations together, we get:
21x = 147
Dividing both sides by 21, we get:
x = 7
Therefore, the value of x is 7. So, the answer is B) 7.