To solve this equation when x + y = 3, we first substitute this equation into the given expression:
6(3x + 5y) + 7x - 5y= 6(3(3) + 5y) + 7(3) - 5y= 6(9 + 5y) + 21 - 5y= 54 + 30y + 21 - 5y= 30y - 5y + 54 + 21= 25y + 75
Therefore, the expression 6(3x + 5y) + 7x - 5y simplifies to 25y + 75 when x + y = 3.
To solve this equation when x + y = 3, we first substitute this equation into the given expression:
6(3x + 5y) + 7x - 5y
= 6(3(3) + 5y) + 7(3) - 5y
= 6(9 + 5y) + 21 - 5y
= 54 + 30y + 21 - 5y
= 30y - 5y + 54 + 21
= 25y + 75
Therefore, the expression 6(3x + 5y) + 7x - 5y simplifies to 25y + 75 when x + y = 3.