Уравнение:(x+5)*3/4=9
(х + 5) * 3/4 = 9 х + 5 = 9 : 3/4 х + 5 = 9 * 4/3 х + 5 = 3 * 4 х + 5 = 12 х = 12 - 5 х = 7 (7 + 5) * 3/4 = 9 12 * 3/4 = 9 3 * 3 = 9 9 = 9
(х+5)*3/4=9 (х+5)*0,75=9 х+5=9:0,75 х+5=12 х=12-5 х=7 ================