Помогите решить уравнения! !! 1) (900-х÷6)×5=4200. 2) 325+(90-n) ÷17=330.
(900-х:6) * 5 = 4200 900 - х:6 = 4200 :5 900 - х :6 = 840 х:6 = 900 - 840 х :6 = 60 х = 60 * 6 х = 360 325 + (90-n ) : 17 = 330 (90 - n) :17 = 330 - 325 (90 - n) :17 = 5 90 - n = 5 * 17 90 - n = 85 n = 90 - 85 n = 5
(900- x÷6)×5=4200 900-x÷6=4200÷5 900-x÷6=840 x÷6=900-840 x÷6=60 x=60×6 x=360 326+(90-n)÷17=330 (90-n)÷17=330-326 (90-n)÷17=4 90-n=17×4 90-n=68 n=90-68 n=22