Question

A) 2x-5y+4
B)7x+8y-9
C)11x-16y+14
D)-15y-2x+5

5c-3a+7d-4b

Answer 1

5C - 3A + 7D - 4B

= 5(11x - 16y + 14) - 3(2x - 5y + 4) + 7(-15y - 2x + 5) - 4(7x+8y-9)

= 55x - 80y + 70 - 6x + 15y - 12 - 105y - 14x + 35 - 28x + 32y - 36

= 55x -6x - 14x - 28x -80y + 15y -105y + 32y + 70 - 12 + 35 - 36

= 7x -138y + 57

...SaLuDoS...