Clare used linear combination to solve the equations shown. she did so by multiplying the second equation by a certain number to eliminate the x-terms. what number did clare multiply the second equation by?
{x - y = 5
{0.5x + 0.1y = 8.5

How do i do this? i don’t understand

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 =

Which graph represents the function g(x) = |x + 4| + 2?