Question

72-х=18*3;,
х:8=130+270;
15*х=630:7;
400:х=1000:10
решить уравнения

Answer 1

$72-x=18*3$
$72-x=54$
$x=72-54$
$x=18$



$x:8=130+270$
$x:8=400$
$x=400*8$
$x=3200$
 

$15*x=630:7$
$15*x=90$
$x=90:15$
$x=6$

$400:x=1000:100$
$400:x=10$
$x=400:10$
$x=40$