Solve the system of equations using the substitution method. 2x − y = -10 y = 4x (x, y) =
Mathematics · Middle School · Thu Feb 04 2021
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Given:
2x - y = -10
y = 4x
Solve using substitution method.
Solution:
In order to solve using substitution method, we substitute the value of y from the second equation, to the value of y to the first equation. Then we solve for x..
2x - (4x) =- 10
-2x = -10
Divide both sides by -2 in order to determine the value of x.
-2x/-2= -10/-2
x = 5
Substitute 5 to the value of x in the second equation.
y = 4(5)
y = 20
Final answer:
{ 5, 20 }