Mirlenepaul
Mirlenepaul
25-02-2016
Mathematics
contestada
Solve x+2y=12 and 2x-y=4 algebraically
Respuesta :
ossashi
ossashi
25-02-2016
Let's solve for x.
x+
2y
=12
Step 1: Add -2y to both sides.
x+
2y
+
−
2y
=
12+
−
2y
x=
−
2y
+12
Answer:
x=
−
2y
+
12
Let's solve for y.
x+
2y
=12
Step 1: Add -x to both sides.
x+
2y
+
−x
=
12+
−x
2y
=
−x
+12
Step 2: Divide both sides by 2.
2y
2
=
−x
+12/
2
y=
−1/
2
x
+6
Let's solve for x.
2x
−y
=4
Step 1: Add y to both sides.
2x
−y
+y
=
4+y
2x
=
y+4
Step 2: Divide both sides by 2.
2x/
2
=
y+4/
2
x=
1/2
y
+2
Let's solve for y.
2x
−y
=4
Step 1: Add -2x to both sides.
2x
−y
+
−
2x
=
4+
−
2x
−y
=
−
2x
+4
Step 2: Divide both sides by -1.
−y/
−1
=
−
2x
+4/
−1
y=
2x
−4
Answer:
y=
2x
−
4
Answer Link
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