Question

Solve each system by substitution

y=4x-5
y=2x-5
Need help with this asap and I need my work shown as well!!!

Answer 1

equalize the both sides of the functions

Explanation:

4x-5 = 2x-5

4x = 2x

2x = x

2 = 1 meaning phi

there is no answer for this problem

Answer 2

x = 0, y = -5

Explanation:

you're given two equations:

y = 4x - 5

y = 2x - 5

to solve, just substitute y in the second equation.

y = 2x - 5

4x - 5 = 2x - 5

now that you have this, solve for x.

4x - 5 = 2x - 5

subtract 2x from both sides

4x - 5 - 2x = 2x - 5 - 2x

2x - 5 = -5

add 5 to both sides

2x - 5 + 5 = - 5 + 5

2x = 0

divide both sides by 2

2x/2 = 0/2

x = 0

now that you know x, substitute x for 0 in the second equation.

y = 2x - 5

y = 2 * 0 - 5

y = 0 - 5

y = - 5