Making a letter the subject

how do i do it?

How do i do the equation in the picture>?

a = (6a - n)/(3 + n)

Solve for "a", and then solve for "n",

Begin by multiplying each side of the equation by (3 + n).

Comments for Making a letter the subject

 Apr 06, 2011 Making a letter the subject by: Staff The question: a = (6a – n) ÷ (3 + n) how do I do it? The answer: a = (6a – n) ÷ (3 + n) a = (6a – n)/(3 + n) Part I: solve for “a” Part II: solve for “n” Part I: solve for “a” a = (6a – n)/(3 + n) Multiply each side of the equation by (3 + n) a * (3 + n) = [(6a – n)/(3 + n)]* (3 + n) a * (3 + n) = (6a – n)* [(3 + n)/(3 + n)] a * (3 + n) = (6a – n)* 1 a * (3 + n) = 6a – n 3a + an = 6a – n Add -6a to each side of the equation 3a - 6a + an = 6a - 6a – n 3a - 6a + an = 0 – n 3a - 6a + an = – n -3a + an = – n Factor “a” from the expression (-3a + an) on the left hand side of the equation using the distributive law a * (-3 + n) = – n a * (n - 3) = – n Divide each side of the equation by (n – 3) a * (n - 3)/(n – 3) = – n/(n – 3) a * 1 = – n/(n – 3) a = – n/(n – 3) Part II: solve for “n” a = (6a – n)/(3 + n) Multiply each side of the equation by (3 + n) a * (3 + n) = [(6a – n)/(3 + n)]* (3 + n) a * (3 + n) = (6a – n)* [(3 + n)/(3 + n)] a * (3 + n) = (6a – n)* 1 a * (3 + n) = 6a – n Use the distributive law to eliminate the parentheses on the left side of the equation 3a + an = 6a – n Add -3a to each side of the equation 3a – 3a + an = 6a – 3a – n 0 + an = 6a – 3a – n an = 6a – 3a – n an = 3a – n Add +n to each side of the equation an + n = 3a – n + n an + n = 3a + 0 an + n = 3a Factor “n” from the expression (an + n) on the left hand side of the equation using the distributive law n * (a + 1) = 3a Divide each side of the equation by (a + 1) n * (a + 1)/(a + 1) = 3a/(a + 1) n * 1 = 3a/(a + 1) n = 3a/(a + 1) the final answer is: a = – n/(n – 3) n = 3a/(a + 1) Thanks for writing. Staff www.solving-math-problems.com

 Aug 10, 2020 change to algerbic expressions NEW by: Anonymous I = (E-P)/(R+r) how to make r the subject