How do solve the following linear system?: $y = 5 x - 7, y = 4 x + 4$ $y = 5x - 7, y = 4x + 4$ ?

Question

How do solve the following linear system?: $y = 5 x - 7, y = 4 x + 4$ $y = 5x - 7, y = 4x + 4$ ?

1 Answer

Related questions

How do you solve systems of equations using the substitution method?
How do you check your solutions to a systems of equations using the substitution method?
When is the substitution method easier to use?
How do you know if a solution is "no solution" or "infinite" when using the substitution method?
How do you solve $y = - 6 x - 3$ $y=-6x-3$ and $y = 3$ $y=3$ using the substitution method?
How do you solve $12 y - 3 x = - 1$ $12y-3x=-1$ and $x - 4 y = 1$ $x-4y=1$ using the substitution method?
Which method do you use to solve the system of equations $y = \frac{1}{4} x - 14$ $y=1/4x-14$ and $y = \frac{19}{8} x + 7$ $y=19/8x+7$ ?
What are the 2 numbers if the sum is 70 and they differ by 11?
How do you solve $x + y = 5$ $x+y=5$ and $3 x + y = 15$ $3x+y=15$ using the substitution method?
What is the point of intersection of the lines $x + 2 y = 4$ $x+2y=4$ and $- x - 3 y = - 7$ $-x-3y=-7$ ?

Impact of this question

3019 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-03-20T02:26:29

Notice that they both have $y$ $y$ by itself, so if you set them equal to each other you can solve for x. This makes sense if you consider that $y$ $y$ has the same value, and must be equal to itself.

Explanation:

$y = 5 x - 7 and y = 4 x + 4$ $y=5x-7 and y=4x+4$
$5 x - 7 = 4 x + 4$ $5x-7=4x+4$
Subtract $4 x$ $4x$ from both sides
$x - 7 = 4$ $x-7=4$
Add 7 to both sides
$x = 11$ $x=11$
$5 (11) - 7 = 48 = 4 (11) + 4$ $5(11)-7=48=4(11)+4$

Science

Math

Humanities

... and beyond

How do solve the following linear system?: $y = 5 x - 7, y = 4 x + 4$ $y = 5x - 7, y = 4x + 4$ ?

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

How do solve the following linear system?: y = 5x - 7, y = 4x + 4 y=5x−7,y=4x+4 y = 5x - 7, y = 4x + 4 ?

1 Answer

Explanation:

Related questions

Impact of this question

How do solve the following linear system?: $y = 5 x - 7, y = 4 x + 4$ $y = 5x - 7, y = 4x + 4$ ?