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mr. diaz classwork math concepts answer all questions show all work date dr mr. diaz classwork math concepts answer all questions show all work hw 38 1. find the solution of each equation. (1) 3 = x - 5 (2) 4y = -9 2. use the distributive property and simplify each expression. a. 2(y - 3) b. 3(x - 2) - 4(6 + 2x) 3. do the indicated operation. (5a² - 3a + 2) - (a² - 3a + 3)
Question 1 (1) : \( 3 = x - 5 \)
Step 1: Isoler \( x \)
Pour isoler \( x \), on ajoute 5 des deux côtés de l'équation.
\( 3 + 5 = x - 5 + 5 \)
Step 2: Calculer
Simplifions les deux côtés.
\( 8 = x \)
Step 1: Isoler \( y \)
Pour isoler \( y \), on divise les deux côtés par 4.
\( \frac{4y}{4} = \frac{-9}{4} \)
Step 2: Simplifier
Simplifions les deux côtés.
\( y = -\frac{9}{4} \)
Step 1: Appliquer la propriété distributive
La propriété distributive dit que \( a(b - c) = ab - ac \). Ici, \( a = 2 \), \( b = y \) et \( c = 3 \).
\( 2(y - 3) = 2 \times y - 2 \times 3 \)
Step 2: Calculer
Simplifions les produits.
\( 2y - 6 \)
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\( x = 8 \)