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Steph223 Steph223
  • 22-01-2017
  • Mathematics
Answered

Solving for systems of equations by substitution.


Y=4x

X+y=5

Verified Answer :

noodlekid
noodlekid noodlekid
  • 22-01-2017

Since the first equation already gives you y, substitute Y for 4x in the second equation.
y=4x
x+y=5

x+(4x)=5
5x=5
x=1

Now that you know x, plug in x for 1 in the first equation.
y=4(1)
y=4
Answer: (1,4)

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