3(28a+b)-73a+8b , а+б=7

Question

3(28a+b)-73a+8b , а+б=7

Answer 1

3( 28a + b ) - 73a + 8b = 84a + 3b - 73a + 8b = 11a + 11b = 11•( a + b )
a + b = 7
11 • 7 = 77
Ответ 77