bryantmadison0
20.08.2019 •
Mathematics
use substitution to solve the system. x=3y+7 and 3x-4y=16
x=
y=
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Ответ:
3(3y+7)-4y=16
Then we can solve it.
9y+21-4y=16
5y=-5
y=-1
Then we can find x.
x=3y+7
x=3(-1)+7
x=-3+7
x=4
Hope I helped!
Ответ:
3x - 4y = 16
Substituting the value of x,
3(3y + 7) - 4y = 16
9y + 21 - 4y = 16
5y + 21 = 16
5y = -5
Thus, y = -1.
Substituting the value of y,
x = 3y + 7
x = -3 + 7
Thus, x = 4.
Thus, x = 4, and y = -1
Ответ:
Lol same
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