which expression is equivalent to 8 + 18a - 2 + 6a?
A. 8(1+2a)-(2+6a)
B. 30a
C. 24a+10
D. 24a+6
A. 8(1+2a)-(2+6a)
B. 30a
C. 24a+10
D. 24a+6