Seudónimo Seudónimo

02-02-2016
Mathematics

contestada

Solve 2a + 21 = 8a - 9, step by step

Respuesta :

Аноним Аноним

02-02-2016

2a + 21 = 8a - 9

Combine like terms.

2a + 21 = 8a - 9
-2a -2a

21 = 6a - 9
+9 +9

30 = 6a
6a/6 = 30/6
a = 5

Answer: a = 5

Answer Link

Otras preguntas

Draw the mechanism for the acid-catalyzed reaction of acetic acid (ethanoic acid) with the methanol to yield methyl acetate (methyl ethanoate)

Mendel's laws relate to the specific behavior of chromosomes during meiosis. mendel's observation that alleles segregate during gamete formation is illustrated

How long should a person wash their hands for in order to help stop the spread of germs?.

The risk of recurrence of a trait based on known incidence in a population refers to?

6.0 mol Al reacts with 4.0 mol O2 to form Al2O3. 4A1+30₂ → 2Al₂O3 How many moles of Al2O3 form when 6.0 mol Al reacts? And how many moles form when 4.0 O2 react

When the sheer volume of information out in the world is overwhelming, it is considered to be which type of listening challenge?

Exercise 3 - questions 1. what types of properties about the substance that you tested did you use to determine whether you thought it was an acid or base?

The concise, one-sentence summary or preview of exactly what you want to say in your speech is called the?

Janice walks 2 kilometers every morning. how many meters does janice walk each day? a) 0.20 meters b) 20 meters c) 200 meters d) 2,000 meter

write 5 sentences on Extrasolar planets in English.