nimahmustafa
16.10.2019 •
Mathematics
Solve system using elimination
3x +3y = 27
x-3y=-11
a.(8,1)
b.(3,6)
c.(6,3)
d.(4,5)
Solved
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Ответ:
x - 3y = -11
add
4x = 16
x = 16/4
x = 4
3x + 3y = 27
3(4) + 3y = 27
12 + 3y = 27
3y = 27 - 12
3y = 15
y = 15/3
y = 5
solution is (4,5)
Ответ:
the correct answer is a