bellamore bellamore

03-07-2018
Mathematics

contestada

Solve for r:2r+7=13
Please help?

Respuesta :

03-07-2018

Hiya!

Switch the equation around:

2r + 7 = 13 ⇒ 13 - 7 = 2r

The sign changes when moved to the other side( + to -)

13 - 7 = 6

[tex] \frac{6}{2} = \frac{2r}{2} [/tex]

r = 2

Answer Link

Otras preguntas

In a biochemical reaction, an enzyme acts as a catalyst, causing the (1) activation energy of the reaction to decrease (2) potential energy of the reactants to

Three of four numbers have a sum of 22. If the average of the four numbers is 8, what is the fourth number?

How many months after Earth’s perihelion position does Earth’s aphelion position occur?

11 Which substance can not be broken down by a chemical change? (1) ammonia (3) ethane (2) arsenic (4) propanal

Julia's service charge at a beauty salon was $72.60, before tax. The sales tax rate was 8%. If she added 20% of the amount before tax as a tip, how much did she

Which development is most closely associated with early inca achievements?

In Volleyball , players serve the ball to the opposing team . If the opposing team fails to hit the ball , the services is called an ace . A player's ace averag

Which term identifies a type of chemical reaction? (1) decomposition (3) sublimation (2) distillation (4) vaporization

What was one major impact of industrialization in the United States? (1) the disappearance of social class distinctions (2) a rise in the standard of living (3)

Write an entry for your blog which describes a place that you have visited which has affected you or stayed in your memory, and explain why this is so. (16 mark