Ons by substitution metho 3x + y = 5 2x + 5y = -1

Question

asked Mar 12, 2024 75.3k views

1 Answer

Brad Barber · Answer 1 · 2024-03-19T07:56:47+0000

Answer:

x = 2; y = -1

Explanation:

We can isolate y in the first equation. Then, we can substitute the result for y in the second equation:

$(3x+y=5)-3x\\y=-3x+5\\\\2x+5(-3x+5)=-1\\2x-15x+25=-1\\-13x+25=-1\\-13x=-26\\x=2$

Now that we've found x, we can substitute this value for x in the first equation to find y:

$3(2)+y=5\\6+y=5\\y=-1$