Question

What is the solution to this equation?

5x + 9 - 3x = 18 + 15

A. x = 8

B. x = 21

C. x = 3

D. x = 12

ANSWER: D (x = 12)

Answer 1

x = 12

Explanation:

5x + 9 - 3x = 18 + 15

2x + 9 = 33

2x (+ 9 - 9) = 33 - 9

2x/2 = 24/2

x = 12

Answer 2

`\huge\boxed{\mathfrak{Question} \downarrow}`

What is the solution to this equation?

• 5x + 9 - 3x = 18 + 15

`\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}`

`\sf5 x + 9 - 3 x = 18 + 15`

Combine 5x and -3x to get 2x.

`\sf2x+9=18+15`

Add 18 and 15 to get 33.

`\sf2x+9=33`

Subtract 9 from both sides.

`\sf2x=33-9`

Subtract 9 from 33 to get 24.

`\sf2x=24`

Divide both sides by 2.

`\sf \: x=(24)/(2) \\`

Divide 24 by 2 to get 12.

`\boxed{ \boxed{ \bf \: x=12 }}`

• The value of x is 12. Yes, the option you clicked is correct. D. x = 12 (✓)