Question

7. The value of x varies directly with y, and

Answer 1

Answer:

$x = y - 7$

Step-by-step explanation:

1. Create an equation

Concept :

If x = 5, then subtracting 5 from both sides gives you x - 5 = 0. Do this to both variables

If x - 5 = 0 and y - 12 = 0, those two statements equal the same thing. So

$x - 5 = y - 12$

2. Add 5 to both sides to isolate variable X

$x = y - 7$

3. (Optional) Plug given values into new equation to check answers

$(5) = (12) - 7$

5 = 5 is a true statement