raffaysadiq raffaysadiq

10-02-2018
Mathematics

contestada

5x−6y=−25
4x−3y+20=0

How many solutions does the system have?

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texaschic101 texaschic101

10-02-2018

4x - 3y + 20 = 0....4x - 3y = -21

4x - 3y = -21.....multiply by -2
5x - 6y = -25
----------------
-8x + 6y = 42 (result of multiplying by -2)
5x - 6y = -25
---------------add
-3x = 17
x = -17/3

this system of equations has 1 solution

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