1) 7(x-9)=63 2) 17(3x16)=238

1)7 * (х - 9) = 63х - 9 = 63 : 7х - 9 = 9х = 9 + 9х = 18проверка:7 * (18 - 9) = 637 * 9 = 6363 = 632)17 * (3х - 16) = 2383х - 16 = 238 : 173х - 16 = 143х = 14 + 163х = 30х = 30 : 3х = 10проверка:17 * (3 * 10 - 16) = 23817 * (30 - 16) = 23817 * 14 = 238238 = 238