Question

How do you evaluate `\frac { 7x - 2y } { 8}` if `x = 5` and `y = 10`?

Answer 1

See a solution process below:

Explanation:

To evaluate the expression for the problem substitute `color(red)(5)` for `color(red)(x)` and substitute `color(blue)(10)` for `color(blue)(y)` and calculate the result:

`(7color(red)(x) - 2color(blue)(y))/8` becomes:

`((7 * color(red)(5)) - (2 * color(blue)(10)))/8 =>`

`(35 - 20)/8 =>`

`15/8`