Answer:
y = -0.2
General Formulas and Concepts:
Pre-Algebra
- Order of Operations: BPEMDAS
- Equality Properties
Explanation:
Step 1: Define equation

Step 2: Solve for y
- Distribute 0.2:

- Cross-multiply:

- Distribute:

- Subtract 1.8y on both sides:

- Subtract 1.8 on both sides:

- Divide both sides by 9:

Step 3: Check
Plug in y to verify it's a solution.
- Substitute:

- Multiply:

- Add:

- Multiply:

- Divide:

Here we see that -90 does indeed equal -90. ∴ y = -0.2 is indeed a solution of the equation.