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Substitution method x=3y-8
asked
Jun 15, 2022
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Substitution method x=3y-8
Mathematics
college
Biberman
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Biberman
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1
Answer
4
votes
Step-by-step explanation:
Solving the first equation for
x
:
x
=
8
−
3
y
Substituting this ( for
x
)in the second equation
2
(
8
−
3
y
)
−
y
=
9
expanding
16
−
6
y
−
y
=
9
16
−
7
y
=
9
so
7
y
=
7
so
y
=
1
and
x
=
8
−
3
x
=
5
Victtim
answered
Jun 21, 2022
by
Victtim
6.8k
points
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