Question

Given that R= 4x +6y find x when y= 4 and R=11

Answer 1

The value of x:

• 
  `x=-(13)/(4)`

Explanation:

Given the equation

`R=4x+6y`

substituting the values y=4 and R=11

`R=4x+6y`

`11=4x+6\left(4\right)`

`11=4x+24`

`11-24=4x`

switching the sides

`4x=11-24`

Subtract the numbers: 11-24=-13

`4x=-13`

Divide both sides by 4

`(4x)/(4)=(-13)/(4)`

`x=-(13)/(4)`

Therefore, the value of x:

• 
  `x=-(13)/(4)`