Question

How do you show whether the point (7,-2) satisfies the equation `3x+4y=29`?

Answer 1

Substitute `color(red)(7)` for `x` in the equation and `color(blue)(-2)` for `y` in the equation and see if the equation is true:

`(3 xx color(red)(7)) + (4 xx color(blue)(-2)) = 29`

`21 + -8 = 29`

`13 != 29` this point does not satisfy the equation.