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rbart4784
24.09.2019 •
Mathematics
Solve the system of equations 2y-3x=-27 5y+3x=6 x= y=
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Ответ:
Step-by-step explanation:
2y-3x=-27
5y+3x=6
You have to add both thee equations, this way the -3x and +3x will cancel out. So add going straight down.
(2y+5y)+(-3x+3x)=(-27+6)
7y=-21
y=-3
And from here plug in y=3 into any of the two original equations
So I picked 2y-3x=-27
2(-3) -3x=-27
-6-3x=-27
-3x=-27+6
-3x=-21
x=7
Ответ:
1 and 2
Step-by-step explanation: