Question

7 + 2y = 8x
3x - 2y = 0
Solve the system of equations by substitution.

Answer 1

find the value of y in terms of x from second eq. and put it in first

Answer 2

3x - 2y = 0

\[\large x = \cfrac{2y}{3}\]

put this value of x in first eq. to get value of y

Answer 3

First I would put one equation in in y=mx+b format

y=4x-7/2

Use that and plug it into your other equation.

3x-2(4x-7/2)=0

From there work it out to find your x
Once you've found your X, plug your x into original problem to solve for Y

Answer 4

thanks a lot :)

Answer 5

No problem (: