Помощь! 7(x-9)-(3x+1)=9
7(х - 9) - (3х + 1) = 9 7х - 63 - 3х - 1 = 9 7х - 3х = 9 + 63 + 1 4х = 73 х = 73 : 4 х = 18,25 Проверка: 7(18,25 - 9) - (3 * 18,25 + 1) = 9 64,75 - 55,75 = 9 9 = 9
7х-63-3х-1=9 4х=73 Х=18,25