Question

Y=3x + 154X-3y =25SOLVE BY SUBSITUTION​

Answer 1

Answer:

y = 3x + 15

so

4x - 3y = 25

4x - 3x + 15 = 25

x = 25 - 15

x = 10

Answer 2

Answer:

$x=-14,y=-27$

Step-by-step explanation:

Given equations:

$y=3x+15$

$4x-3y=25$

We can substitute the first equation into the second:

$4x-3y=25$ (given)

$4x-3(3x+15)=25$ (replaced $y$ for $3x+15$)

$4x-9x-45=25$

$-5x=70$

$x=-14$

We can solve for $y$ by using substitution:

$y=3x+15$ (given)

$=3(-14)+15$

$=-27$

∴ $x=-14,y=-27$

Hope this helps :)