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superfly903
02.08.2019 •
Mathematics
Find the solution of this system of equations. separate the x- and y-values with a comma. x - 2y = 9 and x - y = 11
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Ответ:
First, eliminate x to find the value of y
x - 2y = 9
x - y = 11
- (substract)
-y = -2
y = 2
The value of y is 2
Second, subtitute 2 as y in one of the equation
x - y = 11
x - 2 = 11
x = 11 + 2
x = 13
The solution
x, y = 13, 2
Ответ: