Question

(12a-15b+3c)+(8a+6b-3c)=
(8.5m+4.3n-7)+(1.5m-6.4n-1.8)=
(4/3x2+3/2y-6/5)+(5/3x2+7/2y+2/5)=

Answer 1

(12a-15b+3c)+(8a+6b-3c)= 20a-9b

(8.5m+4.3n-7)+(1.5m-6.4n-1.8)= 10m - 2,1n - 8,8

(4/3x²+3/2y-6/5)+(5/3x²+7/2y+2/5)=9/3x²+10/2y-4/5=3x²+5y-4/5