What is the answer to 5x+3+8x-4=90 ?

The answer to 5x+3+8x-4=90 is x=7

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5x+3+8x-4=90

5 x + 3 + 8 x - 4 = 90

x = 7

Solution steps

5 x + 3 + 8 x - 4 = 90

Group like terms

5 x + 8 x + 3 - 4 = 90

Add similar elements:

5 x + 8 x = 13 x

13 x + 3 - 4 = 90

Add/Subtract the numbers:

3 - 4 = - 1

13 x - 1 = 90

Move

1

to the right side

13 x = 91

Divide both sides by

13

x = 7

7 + 3 = 10

x + 11 = 4

6 = \frac{x}{7.68}

(x + 5) + (\frac{x}{3} + 5) = 54

2 x + 16 = 5 x - 17