Question

8y=5x-15;y=10 which is the answer

Answer 1

`8y=5x-15`

Since we have that y = 10, then:

`8\cdot(10)=5x-15`
`80=5x-15\Rightarrow80+15=5x-15+15\Rightarrow95=5x+0`

Then

`5x=95\Rightarrow(5)/(5)x=(95)/(5)\Rightarrow x=19`

In the first part, we need to sum 15 to both sides of the equation.

In the second part, we divide both sides by 5.

Then, x = 19.