How do you solve $-27< 4.5( 4- n )$ ?

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Answer 1 · 2018-01-11T17:46:45

$n<10$

$-27<4.5(4-n)$

You can write $4.5$ as $9/2$ , now we have:

$-27<9/2(4-n)$ $<=>$

$-27<36/2-(9n)/2$ $<=>$

$-27<18-(9n)/2$ $<=>$

$-54<36-9n$ $<=>$

$-54-36<-9n$ $<=>$

$-90<-9n$ $<=>$

$9n<90$ $<=>$

$n<90/9$ $<=>$

$n<10$

How do you solve -27< 4.5( 4- n )-27< 4.5( 4- n )?