Steph223 Steph223

22-01-2017
Mathematics

contestada

Solving for systems of equations by substitution.

Y=4x
X+y=5

Respuesta :

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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