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The numbers x and y satisfy 7x + 5y = 41 and 5x + 7y =… | StemPy Lab
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The numbers x and y satisfy 7x + 5y = 41 and 5x + 7y = 43. What is the value of xy?
Mathematics
Hard
High School (9–10)
General
Algebra › Pairs of Linear Equations
Olympiad
SAT
Created by
StemPy Lab
The numbers
x
x
x
and
y
y
y
satisfy
7
x
+
5
y
=
41
7x + 5y = 41
7
x
+
5
y
=
41
and
5
x
+
7
y
=
43
5x + 7y = 43
5
x
+
7
y
=
43
. What is the value of
x
y
xy
x
y
?
24
24
24
21
21
21
12
12
12
7
7
7
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← The line kx + 6y = c is the same line as 2x + 3y = 12. Which values of k and c are possible?
The pair 12/x + 18/y = 7 and 9/x - 12/y = 1 has a solution. What is xy? →
More on
Algebra › Pairs of Linear Equations
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