Question

I need help really bad plz

Answer 1

Solving for each variable ----- Let's see :)

12) Solve for d -Since you know that a variable next to a number means to multiply, we'll do the opposite since we have the unknown value -

12d = 216

216 ÷ 12 = 18

d = 18

13) This one is a little different, since we have decimals.

71.5 = 5.5u

We still divide 71.5 by 5.5 and see what we get.

71.5 ÷ 5.5 = 13 (A whole number)

u = 13

14) Divide the first fractions numerator by its denominator - Leave out the variable.

5/6 = 0.83

Do the same to the other fraction

5/14 = 22.8

Divide your 2 decimals.

0.83 ÷ 0.22 = 3.77

x = 3.77

15) 44 = t/11

I think you would multiply 44 by 11 because since a fraction means to divide and we have an unknown value we do the opposite.

44 × 11 = 484

484 ÷ 11 = 44

t = 484

7.8x = 23.4

16) Divide each decimal to get what the value of x is

7.8 ÷ 23.4 = 3

x = 3

17) 53 = r/4

Multiply 53 by 4 to get what r is

53 × 4 = 212

r = 212

↑   ↑   ↑I hope all of this helped you!

TIP - If you want to check your work, make sure you just switch in the variables with the numbers I gave you! :D

Answer 2

12). Divide each side of the equation by  12 .

13). Divide each side of the equation by  5.5 .

14). Divide each side of the equation by  5/6 .
       (Or multiply each side by  6/5 .)

15). Multiply each side of the equation by  11 .

16). Multiply each side of the equation by  14 .

17). Multiply each side of the equation by  3 .

18). Divide each side of the equation by  7.8 .

To check each solution, write it back in the original equation
in place of the letter, and see if the equation becomes a true
statement.