20-10
10
10+ 50
60
5 x 10
50
2 / 10
0.2
3x + 1 = 10
x = 1
54-37
17
78+20
98
8x8
64
5/33
0.15
2(4-y)-3(y+3)=-11
y=2
300-67
233
768+54
822
45 x 60
2700
66/8
8.25