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Hector Travis
Mathematics
16 May, 05:37
Solve by substitution
y=x+3
y=2x+5
+1
Answers (
2
)
Asia Blackburn
16 May, 05:41
0
Y=x+3
y=2x+5
1. Solve for the variable that is easiest to find.
In this case I will solve for x.
y=x+3
-3 - 3
y-3=x
2. Now plug in (y-3) for x in the other equation.
y=2 (y-3) + 5 ~use distributive property
y=2y-6+5 ~combine like terms
y=2y-1
-2y=-2y
-y=-1 ~multiply both sides by - 1
y=1
3. Since you have a value for y you can plug it in to solve for x.
y=x+3
1=x+3
-3 - 3
-2=x
Answers:
y=1
x=-2
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Dax Long
16 May, 05:47
0
Y = x+3
y = 2x+5
x+3 = 2x+5
x+8 = 2x
x = 8
I think I did that right, anyway.
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