Solving linear equations using distributive property: a(x + b) = c

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- What is Distributive Property?
- How to use distributive property to solve linear equations?
How to turn a word problem into an equation?
• ex. 1: "revenue" problem
• ex. 2: "area" problem

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Solve.
1. $11.32 = 8\left( {0.61 + x} \right)$
2. $- 5\left( {2.49 + x} \right) = 17.46$
3. $2\left( {x - 18.5} \right) = - 4.67$
4. $9.5 = - 11.5\left( {x - 5.2} \right)$
Find the value of $x$ $x$ .
1. $\frac{{3.57 + x}}{2} = 2.16$
2. $- 6.79 = \frac{{x - 3.43}}{4}$
3. $- 0.761 = \frac{{0.158 + x}}{{ - 2}}$
4. $\frac{{x - 20.91}}{{ - 5}} = 8.25$
A grocery store has chocolate bars on sale. Each chocolate bar is $0.25 cheaper when 4 of them are purchased. Chris bought 4 chocolate bars, and he paid $8.52. What is the original price of each chocolate bar?