tolong donk no 16 aja please

K= 2x-1+4x+5x-2
K= 11x-3
30=11x-3
30+3=11x
33=11x
X=33/11
X=3

L=1/2×a×t
L= 1/2×4x×2x-1
L=1/2×12×5
L=30(c)
Semoga bermanfaat