Maths-
SAT
Easy
Question
3x + 2y = 16
6x + 2y = 28
If the system of equations above has solution (x, y), what is the value of x + y?
The correct answer is: 6
3x + 2y = 16
6x + 2y = 28
Subtracting, we get
-3x = -12
x = 4
3x + 2y = 16
3(4) + 2y = 16
12 + 2y = 16
2y = 16 -12
2y = 4
y = 2
x + y = 4 + 2 = 6.
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