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Math
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Algebra
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Systems of two linear equations in two variables
medium
r
x
+
18
y
=
40
5
x
+
9
y
=
20
In the given system of equations,
r
is a constant. The system has infinitely many solutions. What is the value of
r
?
A
2
B
5
C
9
D
10
\[rx + 18y = 40 \\ 5x + 9y = 20\]In the given system of equations, \(… | Math SAT Question | Ronan SAT