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Math
·
Algebra
·
Systems of two linear equations in two variables
medium
40
(
0.6
r
−
0.8
s
)
=
−
4
,
320
70
(
0.8
r
+
0.6
s
)
=
7
,
420
The solution to the given system of equations is
(
r
,
s
)
. What is the value of
r
+
s
?
1
170
\[40(0.6r - 0.8s) = -4{,}320 \\ 70(0.8r + 0.6s) = 7{,}420\]The soluti… | Math SAT Question | Ronan SAT