How do solve the following linear system?: $x - 7 y = 4, - 2 x + 5 y = - 3$ $x-7y=4 , -2x+5y=-3$ ?

Question

How do solve the following linear system?: $x - 7 y = 4, - 2 x + 5 y = - 3$ $x-7y=4 , -2x+5y=-3$ ?

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

2045 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-06-05T11:38:37

$x = \frac{1}{9}, y = - \frac{5}{9}$ $x=1/9,y=-5/9$

Explanation:

Multiplying the first equation by $2$ $2$ and adding to the second:
$- 9 y = 5$ $-9y=5$
so $y = - \frac{5}{9}$ $y=-5/9$
Plugging this in the first equation
$x - 7 (- \frac{5}{9}) = 4$ $x-7(-5/9)=4$
$x = 4 - \frac{35}{9} = \frac{36 - 35}{9}$ $x=4-35/9=(36-35)/9$
so $x = \frac{1}{9}$ $x=1/9$

Science

Math

Humanities

... and beyond

How do solve the following linear system?: $x - 7 y = 4, - 2 x + 5 y = - 3$ $x-7y=4 , -2x+5y=-3$ ?

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

How do solve the following linear system?: x−7y=4,−2x+5y=−3 x-7y=4 , -2x+5y=-3 ?

1 Answer

Explanation:

Related questions

Impact of this question

How do solve the following linear system?: $x - 7 y = 4, - 2 x + 5 y = - 3$ $x-7y=4 , -2x+5y=-3$ ?