Question

a×[(130:5+72:2-13):(735:5-140)]=238

Answer 1

a x [ (26+36-13) : ( 147-140)]=238
a x ( 49 : 7) =238
a x 7 = 238
a= 238 : 7
a = 34

Answer 2

$A*[(26+36-13):(147-140)=238 \\ A*49:7=238 \\ A*7=238 \\ A=238:7 \\ A=34$