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19.05.2021 •
Mathematics
Solve by factoring.
x2 - 9x - 22 = 0
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Ответ:
Ответ:
Ответ:
D.
The point of intersection of the graphs of system of equation is the solution to the system of equations.
So, we need to find the solution of the system of equations:
2x – y = 6
5x + 10y = –10
Multiplying first equation by 10 and add it to second equation.
5x+10y+10(2x-y)= -10+60
5x+10y+20x-10y=50
25x=50
⇒ x=2
Step-by-step explanation: