What is the answer to 5a-2(4a+5)=7a ?

The answer to 5a-2(4a+5)=7a is a=-1

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

5a-2(4a+5)=7a

5 a - 2 (4 a + 5) = 7 a

a = - 1

Solution steps

5 a - 2 (4 a + 5) = 7 a

Expand

- 2 (4 a + 5) : - 8 a - 10

5 a - 8 a - 10 = 7 a

Add similar elements:

5 a - 8 a = - 3 a

- 3 a - 10 = 7 a

Move

10

to the right side

- 3 a = 7 a + 10

Move

7 a

to the left side

- 10 a = 10

Divide both sides by

- 10

a = - 1

9 + 5 x = 84

6 = \frac{m}{3} - 9

6 - 3 x = 5 x - 10 x + 6

- 3 x + 8 x - 5 = - 10 x + 9 - 12 x

\frac{1}{3} x = - 2