Maths-
SAT
Easy
Question
y=x+3
2x-y=0
Which of the following is the value of y in the solution (x,y) to the system of equations above?
- -6
- -3
- 3
- 6
The correct answer is: 6
y = x + 3
2x - y = 0
2x - (x + 3) = 0
2x - x - 3 = 0
x - 3 = 0
x = 3
y = x + 3 substitute x = 3
y = 3 + 3 =6.
y = x + 3 substitute x = 3
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