What is the answer to 3x+20+x+40=90 ?

The answer to 3x+20+x+40=90 is x= 15/2

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

3x+20+x+40=90

3 x + 20 + x + 40 = 90

x = \frac{15}{2}

Decimal Notation

x = 7.5

Solution steps

3 x + 20 + x + 40 = 90

Group like terms

3 x + x + 20 + 40 = 90

Add similar elements:

3 x + x = 4 x

4 x + 20 + 40 = 90

Add the numbers:

20 + 40 = 60

4 x + 60 = 90

Move

60

to the right side

4 x = 30

Divide both sides by

4

x = \frac{15}{2}

- 7 x = 63

0 = 3 x - 12

\frac{3}{2} (x + 1) = 3

\frac{x + 7}{4} = \frac{x + 4}{7}

a, g = \frac{a}{c}