Answer:
16x -7y +b +81.2a +z +6
Step-by-step explanation:
Coefficients of terms with the same variable are added when like terms are combined.
12x+4x-7y+45b+78a-44b+1a+1z+0d+1.1a+1.1a+2+2+2
=(12 +4)x +(-7)y +(45 -44)b +(78 +1 +1.1 +1.1)a +(1)z +(2+2+2)
= 16x -7y +b +81.2a +z +6
