What is the answer to 5x-9+2x+10=78 ?

The answer to 5x-9+2x+10=78 is x=11

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5x-9+2x+10=78

5 x - 9 + 2 x + 10 = 78

x = 11

Solution steps

5 x - 9 + 2 x + 10 = 78

Group like terms

5 x + 2 x - 9 + 10 = 78

Add similar elements:

5 x + 2 x = 7 x

7 x - 9 + 10 = 78

Add/Subtract the numbers:

- 9 + 10 = 1

7 x + 1 = 78

Move

1

to the right side

7 x = 77

Divide both sides by

7

x = 11

f = (\frac{1}{3})^{- 1 - 2}

- 6.6 = - 6 + 5 (x + 5.5)

a \cdot x + b = c \cdot x + d

x, 3 x + 8 y = 4

4 (n + 4) = - 12