What is the answer to 3| x/9 |+7=8 ?

The answer to 3| x/9 |+7=8 is x=-3\lor x=3

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3| x/9 |+7=8

3 \frac{x}{9} + 7 = 8

x = - 3 or x = 3

Solution steps

3 \frac{x}{9} + 7 = 8

Move

7

to the right side

3 \frac{x}{9} = 1

Divide both sides by

3

\frac{x}{9} = \frac{1}{3}

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

\frac{x}{9} = - \frac{1}{3} or \frac{x}{9} = \frac{1}{3}

\frac{x}{9} = - \frac{1}{3} or \frac{x}{9} = \frac{1}{3}

x = - 3 or x = 3

x^{2} + 6 x = - 5

(\frac{6}{- 4})^{2}

\frac{2 π}{\frac{1}{7}}

3 b^{2} - 36 b - 135

\frac{( 9 \cdot 1 0 ^{9} ) ( 444 \cdot 1 0 ^{- 12} )}{2}