Solve for y and x using the substitution method.
y = 2x
y = 3x + 1
I'm not certain what you're asking. Solve for x? Just set the two expressions equal.
3x + 1 = 2x
Subtract 2x from each side 3x – 2x + 1 = 2x – 2x
x + 1 = 0
Subtract 1 from each side x + 1 – 1 = 0 – 1
x = –1
The guest has used the substitution method.....
And since x = -1
Then y = 2(-1) = - 2