How do you solve y= 4x + 45 and x= 4y?

Question

How do you solve y= 4x + 45 and x= 4y?

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

6144 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-10-04T22:26:20

$x = - 12$ $x=-12$ , $y = - 3$ $y=-3$

Explanation:

Knowing that $x = 4 y$ $x=4y$ , you can write the first equation as

$y = 4 (4 y) + 45 \to y = 16 y + 45 \to - 15 y = 45$ $y=4(4y)+45 -> y=16y+45 -> -15y=45$ , isolating the $y$ $y$ -terms by bringing them all to the left. Now, solving by $y$ $y$ , we have $y = - 3$ $y=-3$ .

Since $x$ $x$ was $4 y$ $4y$ , we know that $x = 4 \cdot (- 3)$ $x=4*(-3)$ , and thus $x = - 12$ $x=-12$ and the system is solved.

Science

Math

Humanities

... and beyond

How do you solve y= 4x + 45 and x= 4y?

1 Answer

Explanation:

Related questions

Impact of this question