Sure! Let's break it down:
Imagine you have a special recipe for making lemonades that requires two ingredients: lemons and sugar. In math, instead of lemons and sugar, we use numbers and letters to represent values and unknowns.
So, in your equation, -10x + 3y = 5, think of it as a lemonade formula where x represents the number of lemons and y represents the amount of sugar needed to make a special lemonade that costs $5. When you look at the equation, -10x represents the cost of lemons and 3y represents the cost of sugar.
The second equation, x = y - 4, is like saying the number of lemons you have is equal to the amount of sugar minus 4. Think of it as knowing that if you have 5 cups of sugar, you must have 1 lemon because 5 - 4 = 1.
When you write the two equations together, it's like figuring out how many lemons and sugar you need to make a perfect $5 lemonade. By solving the equations, you can find out the exact values of x (lemons) and y (sugar) that work together to make the best lemonade according to your recipe.