Question

Find the value of $d$.

$\frac{3d}{6}+4=19$

Answer 1

3d/6+4= 19

move +4 to the other side

sign changes from +4 to -4

3d/6+4-4= 19-4

3d/6= 15

Mutiply both sides by 6/3 to get d by itself

3d/6*6/3- Cross out 3 and 3 , divide by 3 and becomes 1

Cross out 6 and 6, divide by 6 and becomes 1

1*1*d= d

15(6/3)- Cross out 15 and 3, divide by 3

15/3= 5

3/3= 1

5/1= 5 , 5*6= 30

answer: d= 30

Answer 2

Answer:

d = 30

Step-by-step explanation:

Isolate the variable, d. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

Note that PEMDAS =

Parenthesis

Exponents (& roots)

Multiplication

Division

Addition

Subtraction

...and is the order in which you solve.

First, subtract 4 from both sides:

(3d)/6 + 4 = 19

(3d)/6 + 4 (-4) = 19 (-4)

(3d)/6 = 19 - 4

(3d)/6 = 15

Isolate the variable, d. Multiply 6 to both sides.

(3d)/6 x 6 = 15 x 6

3d = 15 x 6

Isolate the variable, d. Divide 3 from both sides:

(3d)/3 = 15 x (6/3)

d = (15 x (6/3) = 15 x 2 = 30)

d = 30

30 is your answer for d.