Question

subtract the sum of 12x+9xy+21y and12x+11xy -13y from the sum of4x+18xy -7y and 12xy -12y​

Answer 1

Answer:

-20x+10xy-27y

Explanation:

[(4x+18xy-7y)+(12xy-12y)]-[(12x+9xy+21y)+(12x+11xy-13y)]

[4x+18xy-7y+12xy-12y]-[12x+9xy+21y+12x+11xy-13y]

[4x+30xy-19y]-[24x+20xy+8y]

4x+30xy-19y-24x-20xy-8y

-20x+10xy-27y