Step-by-step explanation: add : 3x + 7 and x – 4y + 9 = (3x + 7) + (x – 4y + 9) = 3x + 7 + x – 4y + 9 = (3x + x) + (7 + 9) – 4y = 4x + 16 – 4y Reply
Step-by-step explanation:
add : 3x + 7 and x – 4y + 9
= (3x + 7) + (x – 4y + 9)
= 3x + 7 + x – 4y + 9
= (3x + x) + (7 + 9) – 4y
= 4x + 16 – 4y