What is the answer to (3x+9)-x=12 ?

The answer to (3x+9)-x=12 is x= 3/2

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(3x+9)-x=12

(3 x + 9) - x = 12

x = \frac{3}{2}

Decimal Notation

x = 1.5

Solution steps

(3 x + 9) - x = 12

Remove parentheses:

(a) = a

3 x + 9 - x = 12

Group like terms

3 x - x + 9 = 12

Add similar elements:

3 x - x = 2 x

2 x + 9 = 12

Move

9

to the right side

2 x = 3

Divide both sides by

2

x = \frac{3}{2}

6 (n - 1) = 4 (n + 2) - n

\frac{y}{4} = 8

\frac{1}{2} (6 x - 4) = 4 x - 9

- 3 k + 24 - 5 = 23 + k

x, 0.5 x + 0.2 y = 3.45