a) 160x = 3200x = 3200 / 160x = 20
b) 9000 - x = 630
c) 4000 : y = 25y = 4000 / 25y = 160
d) y + 490 = 500y = 500 - 490y = 10
e) k - 3200 + 8 = 0k = 3200 - 8k = 3192
a) 160x = 3200
x = 3200 / 160
x = 20
b) 9000 - x = 630
x = 630 - 9000x = -8370x = 8370
c) 4000 : y = 25
y = 4000 / 25
y = 160
d) y + 490 = 500
y = 500 - 490
y = 10
e) k - 3200 + 8 = 0
k = 3200 - 8
k = 3192