Theoriginal priceof the microwave before the sale was $150.In summary, the value of x in the givenequationis 10.2, and the original price of the microwave before the sale was $150.The given equation is -2.3x - 4.2x = -66.3. To solve this equation, we can combine liketermson the left side of the equation:-2.3x - 4.2x = -66.3-6.5x = -66.3Next, we can isolate thevariablex bydividingboth sides of the equation by -6.5:-6.5x / -6.5 = -66.3 / -6.5x = 10.2So, the value of x is 10.2.Regarding Javier's purchase, we know that the microwave was bought for $105 after a 30% discount. To find the original price, we need to determine the price before the sale.Let's assume the original price of the microwave is P. Since the microwave was sold at a 30% discount, the discounted price can be found bysubtracting30% of the original price from the original price:Discounted price = Original price - (30/100) * Original price105 = P - 0.3PSimplifying the equation:105 = 0.7PTo find P, we can divide both sides of the equation by 0.7:105 / 0.7 = PP = 150learn more aboutvariablehere:brainly.com/question/16906863#SPJ11...

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