Introduction to Systems of Linear Equations — Quiz
Question 10 • Algebra 2 with Probability
The sum of two numbers is 28 The first number, is three times the second number, y Which system of equations can be used to find the two numbers?
Answer
A
x plus y is equal to 28; x is equal to 3 plus y
B
x plus y is equal to 28; x is equal to 3 y
C
x y is equal to 28; x is equal to 3 y
D
x y is equal to 28; x is equal to 3 plus y
Explanation
Let x be the first number and y be the second. Their sum is 28, so x + y = 28, and the first is three times the second, so x = 3y. These equations match choice B.
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