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Simpson is solving the systems of equations below by substitution. Show Mr. Simpsons first step if he substitutes the first equation into the second equation. DO

SOLVE!


y = 5x + 12

3y + 4x = 150


I’m struggling on this one.

User Edamame
by
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1 Answer

1 vote

Answer:


x=6,y=42

Explanation:

The equations are


y=5x+12


3y+4x=150

Substituting the first equation in the second we get


3(5x+12)+4x=150


\Rightarrow 15x+36+4x=150


\Rightarrow x=(150-36)/(19)


\Rightarrow x=6


y=5x+12=5* 6+12\\\Rightarrow y=42

So, the required values are
x=6,y=42

User FBC
by
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