Dthompsonid
Dthompsonid
Mathematics
Answered
9x+10y=14
7x+5y=-3
Any method!
THX!!!
Sagot :
Naǫid
Naǫid
[tex]9x+10y=14 \\ 7x+5y=-3 \ \ \ |\times (-2) \\ \\ 9x+10y=14 \\ \underline{-14x-10y=6} \\ 9x-14x=14+6 \\ -5x=20 \\ x=\frac{20}{-5} \\ x=-4 \\ \\ 9x+10y=14 \\ 9 \times (-4)+10y=14 \\ -36+10y=14 \\ 10y=14+36 \\ 10y=50 \\ y=5 \\ \\ (x,y)=(-4,5)[/tex]
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