## Introductory Algebra for College Students (7th Edition)

$$x = - \frac{2}{3}$$
We use distributive property first: $$2x + 6 + 2x = x + 4$$ Subtract $x$ on both sides to isolate the variable to one side of the equation: $$2x + 6 + 2x - x = 4$$ Group like terms together: $$(2x + 2x - x) + 6 = 4$$ Combine like terms: $$3x + 6 = 4$$ Subtract $6$ from both sides to get the constants on one side of the equation: $$3x = - 2$$ Divide both sides by $3$ to solve for $x$: $$x = - \frac{2}{3}$$