Решите уровнение 11 (15-7x) = -78 + 4 x

11(15-7х)=-78+4х 165-77х=-78+4х 165+78=4х+77х 81х=243 х=243:81 х=3

11 (15-7x) = -78 + 4 x 165 - 77x = - 78 + 4x 165 + 78 = 4x + 77x 81x = 243 x = 243 : 81 x = 3 -------------------------------------