Your answer is
![x = (8-y) / 5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/1f8x94on5v6zi5vluik2zsojfuroiniajs.png)
Here's how:
Step 1: Add 1 to both sides. 10x + 2y = 15 + 1
Step 2: Simplify 15 + 1 to 16. 10x + 2y = 16
Step 3: Factor are the common term 2. 2(5x + y) = 16
Step 4: Divide both sides by 2. 5x + y = 16/2
Step 5: Simplify 16/2 to 8. 5x + y = 8
Step 6: Subtract y from both sides. 5x = 8 - y
Step 7: Divide both sides by y. x = (8-y) / 5
This answer is if you want to solve for x! If you want to solve for y, let me know and I'll change my answer! Have a nice night!