Question

How do you solve `8x + 3x = 121`?

Answer 1

`x=11`

Explanation:

Simplify the left side by collecting like terms.

`rArr8x+3x=121`

`rArr11x=121`

To solve for x, divide both sides of the equation by 11

`(cancel(11)^1 x)/cancel(11)^1=121/11`

`rArrx=11`

`color(blue)"As a check"`

Substitute this value into the left side and if equal to the right side then it is the solution.

`(8xx11)+(3xx11)=88+33=121`

`rArrx=11" is the solution"`