Question

5x + 2y = 10
13x – 4y
=
-66

1) 2(5x + 2y = 10)
13x – 4y
=
-66

2) 10x + 4y = 20
13x – 4y = -66
23x + 0y = -46
x = -2


3) If x = -2, then y = 10.

Answer 1

5x + 2y = 10

13x – 4y = -66

What is the solution of this system?

Answer 2

try multiplying first equation by 2..then add them and what do you get ?

Answer 3

There are several ways in which you could solve this system:
Elimination
substitution
graphing
... and more.

Which one or ones do you know best?
Please, get started on the problem, do something, before you ask for help here.

Answer 4

suggest using the elimination method.
multiply the first equation by 2 add the new equation with equation 2 to eliminate y.
solve for x.
use this value of x to calculate y

Answer 5

i dont know im so confused

Answer 6

as stated by mathmale there are several methods to choose from to solve simultaneous equations.
follow the directions above to use the elimination method.
with practice you will know which method might be faster
they will all give the same result

Answer 7

what are you confused about?
do you know how to multiply the first equation by 2?