x-y=-2 x-y=1 by substitution please solve
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Answered by
0
Step-by-step explanation:
1.5, -0.5)
Explanation:
x
+
y
=
1
x
+
y
−
y
=
1
−
y
So
x
=
1
−
y
Substitute this x-value into the second equation.
(
1
−
y
)
−
y
=
2
1
−
2
y
=
2
1
−
2
y
−
1
=
2
−
1
−
2
y
=
1
−
2
y
−
2
=
1
−
2
y
=
−
0.5
Substitute this answer into the original formula
x
+
(
−
0.5
)
=
1
x
+
(
−
0.5
)
+
(
0.5
)
=
1
+
(
0.5
)
x
=
1.5
Check by substituting into the second formula.
1.5
−
(
−
0.5
)
=
2
2
=
2
Answered by
0
Answer:
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