Question

( 1000-dX2-25X4) : 6=144

Answer 1

1000 – d x 2 – 100 = 24
1000 – d x 2 = 124
d x 2 = 1000 – 124
d x 2 = 976
d = 488

Answer 2

1000 – d x 2 – 100 = 24
1000 – d x 2 = 124
d x 2 = 1000 – 124
d x 2 = 976
d = 488