What is the answer to x+11+2x+9=8 ?

The answer to x+11+2x+9=8 is x=-4

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x+11+2x+9=8

x + 11 + 2 x + 9 = 8

x = - 4

Solution steps

x + 11 + 2 x + 9 = 8

Group like terms

x + 2 x + 11 + 9 = 8

Add similar elements:

x + 2 x = 3 x

3 x + 11 + 9 = 8

Add the numbers:

11 + 9 = 20

3 x + 20 = 8

Move

20

to the right side

3 x = - 12

Divide both sides by

3

x = - 4

5 x + (3 x - 7) = 9

12 = 3 n

2 + 8 - z = - 24

\frac{7 x}{2} - 3 = 4

0.3 n = 2.1 (n - 4), 15 = 4