v4leriaaa
02.10.2020 •
Mathematics
Solving Linear Systems: Using Substitution
x=3y-4
3y - 4x = 6
someone pls help
Solved
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Ответ:
x = -2/3
y = 10/9
Step-by-step explanation:
3y - 4x = 6
x=3y-4
Substitute the second equation into the first for x
3y - 4( 3y-4) =6
3y - 12y +16 = 6
Combine like terms
-9y +16 = 6
Subtract 16 from each side
-9y +16-16 = 6-16
-9y = -10
Divide by -9
-9y/-9 = -10/-9
y = 10/9
x = 3y -4
x =3(10/9) -4
=10/3 - 12/3
=-2/3
Ответ: