60744
26.02.2021 •
Mathematics
Solve the system of equations. What is the value of "a" that makes the system of equations true? (please answer quickly) also, what is the value of "y"
b=2/3a+1
b=-1/3a+7
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Ответ:
-1/4x + y = 1
x - 4y = -4 <
y = -3/4x + 9
3/4x + y = 9
3x + 4y = 36 <
1/4x + 1 = -3/4x + 9
1/4x + 3/4x = 9 - 1
x = 8
y = 1/4x + 1
y = 1/4(8) + 1
y = 2 + 1
y = 3
solution is : (8,3)
and ur answer is : A