To simplify the expression 3(28+в)-73a+8в when a + в = 7, we first substitute the value of a + в into the given expression:
3(28 + в) - 73a + 8в= 3(28 + 7 - a) - 73a + 8(7 - a)= 3(35 - a) - 73a + 56 - 8a= 105 - 3a - 73a + 56 - 8a= 161 - 14a
Therefore, when a + в = 7, the expression simplifies to 161 - 14a.
To simplify the expression 3(28+в)-73a+8в when a + в = 7, we first substitute the value of a + в into the given expression:
3(28 + в) - 73a + 8в
= 3(28 + 7 - a) - 73a + 8(7 - a)
= 3(35 - a) - 73a + 56 - 8a
= 105 - 3a - 73a + 56 - 8a
= 161 - 14a
Therefore, when a + в = 7, the expression simplifies to 161 - 14a.