a) 2/25 + 23/25 - 1/4020 + 1/19 - 4/19 - 5/19= (2 + 23 - 1 - 4 - 5)/25 - 1/4020= 15/25 - 1/4020= 3/5 - 1/4020= (2412 - 1)/4020= 2411/4020
b) 37 7/200 + x = 39 4/200x = (39 4/200) - (37 7/200)x = 39 + 4/200 - 37 - 7/200x = (39 - 37) + (4 - 7)/200x = 2 + (-3)/200x = 2 - 3/200x = 199/100
c) (24 4/25 - x) - 17 6/25 = 2 23/2524 + 4/25 - x - 17 - 6/25 = 2 + 23/2524 - 17 + 4/25 - 6/25 - x = 2 + 23/257 + (4 - 6)/25 - x = 2 + 23/257 - 2/25 - x = 2 + 23/257 - 2/25 - x = 2 + 23/257 - 2/25 - x = 2 + 23/257 - 2/25 - x = 2 + 23/25x = 7 - 1 - 2/25 + 23/25x = 6 + 21/25x = (150 + 21)/25x = 171/25
a) 2/25 + 23/25 - 1/4020 + 1/19 - 4/19 - 5/19
= (2 + 23 - 1 - 4 - 5)/25 - 1/4020
= 15/25 - 1/4020
= 3/5 - 1/4020
= (2412 - 1)/4020
= 2411/4020
b) 37 7/200 + x = 39 4/200
x = (39 4/200) - (37 7/200)
x = 39 + 4/200 - 37 - 7/200
x = (39 - 37) + (4 - 7)/200
x = 2 + (-3)/200
x = 2 - 3/200
x = 199/100
c) (24 4/25 - x) - 17 6/25 = 2 23/25
24 + 4/25 - x - 17 - 6/25 = 2 + 23/25
24 - 17 + 4/25 - 6/25 - x = 2 + 23/25
7 + (4 - 6)/25 - x = 2 + 23/25
7 - 2/25 - x = 2 + 23/25
7 - 2/25 - x = 2 + 23/25
7 - 2/25 - x = 2 + 23/25
7 - 2/25 - x = 2 + 23/25
x = 7 - 1 - 2/25 + 23/25
x = 6 + 21/25
x = (150 + 21)/25
x = 171/25