Question

To solve the sustem of equations below, kira isolated variable y in the first equation then sybstituted it into the second equation.what was the resulting equation? 3y=12x, x^2+y^2=81

Answer 1

`x^2+(4x)^2=81` or
`x^2+16x^2=81` or
`17x^2=81`

Explanation:

Given :
`3y=12x`

`x^2+y^2=81`

To Find: Kira isolated variable y in the first equation then substituted it into the second equation.what was the resulting equation?

Solution:

`3y=12x` --1

`x^2+y^2=81` --2

Value of y from 1

`y=4x`

Substitute this value of y in 2

`x^2+(4x)^2=81`

`x^2+16x^2=81`

`17x^2=81`

Hence the resulting equation is
`x^2+(4x)^2=81` or
`x^2+16x^2=81` or
`17x^2=81`