What is the answer to 3x+13+x-7=90 ?

The answer to 3x+13+x-7=90 is x=21

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

3x+13+x-7=90

3 x + 13 + x - 7 = 90

x = 21

Solution steps

3 x + 13 + x - 7 = 90

Group like terms

3 x + x + 13 - 7 = 90

Add similar elements:

3 x + x = 4 x

4 x + 13 - 7 = 90

Add/Subtract the numbers:

13 - 7 = 6

4 x + 6 = 90

Move

6

to the right side

4 x = 84

Divide both sides by

4

x = 21

4 x - 3 = 4 x + 2

6 x - 42 = 0

\frac{x - 2}{3} = 8

\frac{2}{5} x - 3 x - 5 = 8 x - 6 + 2

2 (1) + y = 5