500000+0.10(A-2500000)
2(x-7) +5 (8x+2); if x=-10
$5:35= 100:70$
3+2=?
5:35 00=
1590=(330+2.44/330+u)1600
1590=(330+2.44/330+u)160
3/-4
-4/3
10x -3 (x+2) + 5x-4; if x =1
