what is the equation- x=7y [9p] *x
Answers
Answered by
2
Answer:mark me as brainliest
Step-by-step explanation:Step 1) Solve the first equation for
x
:
x
−
7
y
=
9
x
−
7
y
+
7
y
=
9
+
7
y
x
−
0
=
9
+
7
y
x
=
9
+
7
y
Step 2) Substitute
9
+
7
y
for
x
in the second equation and solve for
y
:
7
y
=
3
x
+
1
becomes:
7
y
=
3
(
9
+
7
y
)
+
1
7
y
=
(
3
⋅
9
)
+
(
3
⋅
7
y
)
+
1
7
y
=
27
+
21
y
+
1
7
y
=
28
+
21
y
7
y
−
21
y
=
28
+
21
y
−
21
y
(
7
−
21
)
y
=
28
+
0
−
14
y
=
28
−
14
y
−
14
=
28
−
14
−
14
y
−
14
=
−
2
y
=
−
2
Step 3) Substitute
−
2
for
y
in the solution to the first equation at the end of Step 1 and calculate
x
:
x
=
9
+
7
y
becomes:
x
=
9
+
(
7
⋅
−
2
)
x
=
9
+
(
−
14
)
x
=
9
−
14
x
=
−
5
The solution is:
x
=
−
5
and
y
=
−
2
or
(
−
5
,
−
2
)
Similar questions