Question

Здравствуйте помогите номер 11

Answer 1

(480-a) : 4 a • 3 - 250 (a - 130 ) • 2
a = 480:4. a = 250 : 3. a = 130 • 2
a = 120. a = 24,33333. a = 260

400 - a : 8 a + 80 : 10. (a + 70 ) : 10
a = 400 • 8. a = 80 • 10. a = 70 • 10
a = 3200. a = 800. a = 700