Question

2x{27-2x[3xa-(35:5-2x3)]+3}:4=10

Answer 1

2×[ 27 - 2 × ( 3× a - 1) +3 ] = 10 ×4
2× [ 27 -2 ( 3a -1 )= 40- 3
2× ( 27 - 6a + 2 ) =37
54 - 12 a + 4 = 37
54 - 12 a = 37-4
54- 12a =33
54 - 33 = 12a
21 = 12 a
a= 21: 12
a= 1,75