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Elena-2011 [213]
3 years ago
13

Solve the following system of equations. x − 2y = 5 −3x + 2y = 7

Mathematics
2 answers:
weeeeeb [17]3 years ago
8 0
Number b is ans correct
lawyer [7]3 years ago
6 0
The answer is B, see how to calculate it
----
x=5+2y
-3(5+2y)+2y=7   ///put things from the first equation into the second one 
---
x=5+2y
-15-6y+2y=7   ///reduce
---
x=5+2y
-4y=7+15    /// move everything without y into right side
-----
x=5+2y
-4y=22    ////reduce
-----
x=5+2y
y=-11/2    ///dive by what stands 
----
x=5+2*(-11/2)
y=-11/2
---
x=-6
y=-11/2


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