Ask question

Ask question

All categories

2 years ago

11

Solve and check the following equation. 8d + 21 = 12d + 5 d =

1 answer:

olganol [36]2 years ago

3 0

Subtract 8d from both sides

21 = 12d + 5 - 8d

Simplify 12d + 5 - 8d to 4d + 5

21 = 4d + 5

Subtract 5 from both sides

21 - 5 = 4d

Simplify 21 - 5 to 16

16 = 4d

Divide both side by 4

16/4 = d

Simplify 16/4 to 4

4 = d

Switch sides

d = 4

<u>Check answer</u>

8d + 21 =12d + 5

Let d = 4

8 × 4 + 21 = 12 × 4 + 5

Simplify 8 × 4 to 32

32 + 21 = 12 × 4 + 5

Simplify 12 × 4 to 48

32 + 21 = 48 + 5

Simplify 32 + 21 to 53

53 = 48 + 5

Simplify 48 + 5 to 53

53 = 53

You might be interested in

How do you write 2 thousands plus 12 hundreds in standard form

mamaluj [8]

The standard for is 2000+ 1200

6 0

2 years ago

Read 2 more answers

For which of the following are x=4 and x=-4 solutions?

ELEN [110]

Answer:

2x2 - 5x - 12 = 0.

(2x + 3)(x - 4) = 0.

2x + 3 = 0 or x - 4 = 0.

x = -3/2, or x = 4. I hope this helps

Step-by-step explanation:

5 0

2 years ago

If tan (θ )=0.532 , and α is the complement of θ , then tan (α) =

goblinko [34]

Answer:

tan(α) = 89.468

Step-by-step explanation:

90 - 0.532

6 0

1 year ago

How do I begin this problem for geometry?

kirill115 [55]

X + 71 + x + 131 = 180

6 0

3 years ago

Read 2 more answers

How to draw and share 8 students share 5 Square pieces of cake equally

gayaneshka [121]

40 square pieces of cake equally of the 8 studentd

8 0

2 years ago