Question

Solve by substitution
14x-35=7y
-25-6x=5y

Answer 1

[1] 14x = 7y + 35

[1] x = y/2 + 5/2

// Plug this in for variable x in equation [2]

[2] -6•(y /2+5/2) - 5y = 25


[2] - 8y = 40

// Solve equation [2] for the variable y

[2] 8y = - 40

[2] y = - 5

// By now we know this much :

x = y/2+5/2
y = -5

// Use the y value to solve for x

x = (/2)(-5)+5/2 = 0
Solution :

{x,y} = {0,-5}

Answer 2

{x,y} = {0,-5}

Answer 3

thank you so much. do you think you can help me with another?