Question

1 + |1/3a| = 4
help find solution ? >.<

Answer 1

step 1
take one from both sides

Answer 2

is the 'a' part of the fraction or not?

Answer 3

it's a variable aside

Answer 4

\[\left|\frac 13a\right|=3\]\[\frac 1 3\left|a\right|=3\]\[|a|=1\]\[a=\pm1\qquad=1,\quad -1\]

Answer 5

um not really no

Answer 6

\[\text {iff }|a|=9\]\[a=9\qquad\text{or}\qquad a=-9\]

Answer 7

Sorry, but also your answer of +1 and -1 was not right?
I was thinking that a^2 =9

Answer 8

oh i see a mistake in my working
\[\frac{1}{3}|a|=3\]\[3\times\frac{1}{3}|a|=3\times3\]\[|a|=9\]

sorry about that