Determine the solution to f(x) = g(x) using the following system of equations:

f(x) = 3x − 23
g(x) = −4.5x + 7

Question

Determine the solution to f(x) = g(x) using the following system of equations:

f(x) = 3x − 23
g(x) = −4.5x + 7

anonymous · Answer

Just solve for the system of equations. What do you think is the answer?.

anonymous · Answer

x = 4 so now all you have to do is solve for y

anonymous · Answer

they asked for x

snuggielad · Answer

Nixy, where did you get x=4?

anonymous · Answer

Well, you have your answer now lol I just gave it to you lol

anonymous · Answer

SnuggieLad http://www.wolframalpha.com/input/?i=y+%3D+3x+%E2%88%92+23+and+y+%3D+%E2%88%924.5x+%2B+7

snuggielad · Answer

Why don't you explain that Nixy? That way the next time she can get it herself, that's the sign of a true helper.

anonymous · Answer

Well, the book she/he uses for math should explain it :-) Here are a few good links that explains system of equations http://www.mathsisfun.com/algebra/systems-linear-equations.html https://www.khanacademy.org/math/algebra-basics/core-algebra-systems/core-algebra-systems-tutorial/v/solving-linear-systems-by-graphing

decentnabeel · Answer

3x − 23=−4.5x + 7
add 4.5x and 23 on both sides
3x+4.5x=7+23
multiple by 10 on both sides
$$\[10\cdot \:3x+10\cdot \:4.5x=10\cdot \:7+10\cdot \:23$$\]
75x=300
x=4

decentnabeel · Answer

are you understand @Naenae1999