How do you solve 3xーy=8 x=5-2y?

1 Answer
Jun 4, 2018

We already know what x equals so we can just use substitution to find what y is equal to; we can then find the value of x using that.

y=1

x=7

Explanation:

Substitue the equation x=52y into the x vairiable of 3xy=8

3(52y)y=8

156yy=8

157y=8

7y=7

y=1

We can now substitute the value of y into our original equation

x=52(1)

x=5(2)

x=7

So x=7 and y=1