What is the answer to 5x+8+3x+4=40-4 ?

The answer to 5x+8+3x+4=40-4 is x=3

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5x+8+3x+4=40-4

5 x + 8 + 3 x + 4 = 40 - 4

x = 3

Solution steps

5 x + 8 + 3 x + 4 = 40 - 4

Group like terms

5 x + 3 x + 8 + 4 = 40 - 4

Add similar elements:

5 x + 3 x = 8 x

8 x + 8 + 4 = 40 - 4

Add the numbers:

8 + 4 = 12

8 x + 12 = 40 - 4

Subtract the numbers:

40 - 4 = 36

8 x + 12 = 36

Move

12

to the right side

8 x = 24

Divide both sides by

8

x = 3

0.4 x + 0.8 = 1.2

\frac{x + 4}{3} = \frac{x + 6}{4}

20 = x - 9

(a - 3) 2 = 5 - 10 a

\frac{1}{3} (6 f + 5) + \frac{2}{3} (3 f - 1) = \frac{4}{3} f