How do you use a number line to find a decimal equivalent of 1 7/10

What is the value of x in the diagram below?

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

If sin(x) = 0 and cos(x) = 1, what is tan(x)?