If 8x+6y = -4 and x+2=0, what is the value of y?
A)-3 1/3
B)-2
C)-(2/3)
D)2/3
E)2

Question

Quizplus · Accepted Answer

This is a problem of solving two linear equations with two variables.
From the second equation x+2=0 , you get value of one variable x = -2. Put this value of x in the first equation to get the value of second variable
8x+6y = -4.
-16 +6y = -4
6y =12 or y = 2
Key takeaway: The normal way is to go for solving the two linear equations by the standard method and find the two variables. But that may be a longer rout. So always first look for any other way to attack such problems say finding one variable .

If 8x+6y = -4 and X+2=0, What Is the Value