3x+4y=23

5x+3y=31

un algebra math

For the first equation we must multiplication by 5

3x+4y=23 ⇒ 5. (3x+4y) = 23.5 ⇒ 15x+20y=115

For the second equation we must multiplication by (-3)

5x+3y=31 ⇒ - 3 (5x+3y) = 31. (-3) ⇒ - 15x-9y=-93

We must unite two equations.

x's is lost;

11y=22

y=2; x=5

Are u trying to solve for x and y?

if so, use the substitution or elimination method to solve!