Question

9(3x-7)+3(8x-11)=3(9x+8) 

 

Answer 1

27х-63+24х-33=27х+24   27х+24х-27х=24+63+33   24х=120    х=120/24   х=5

Answer 2

$9(3x-7)+3(8x-11)=3(9x+8)$

 

$27x-63+24x-33=27x+24$

 

$51x-96=<var>27x+24</var>$

 

$51x-27x=24+96<var></var>$

 

$24x=120<var></var>$

 

$x=120:24<var></var>$

 

$x=5<var></var>$

_______________________________________________________________________

$9cdot(3cdot5-7)+3cdot(8cdot5-11)=3cdot(9cdot5+8)$ (это проверка)

 

$9cdot(15-7)+3cdot(40-11)=3cdot(45+8)$

 

$9cdot8+3cdot29=3cdot53$

 

$72+87=159$

 

$159=159$