What are systems of equations and inequalities definitions?

A system of equations is a set of equations with the same variables. A system of inequalities is almost exactly the same, except you're working with inequalities instead of equations. To solve such a system, you need to find the variable values that will make each inequality true at the same time.

Step-by-step explanation:

Hope this helps. :D

if x decreases by 4 then y increases by 10

step-by-step explanation:

its 4 because 2 times 2 is 4, if you double the number two you get four