Conditional formatting

Hello.
i have a question if any one can help me.
i want to highlight values in three columns based on the criteria that one value in Column A is the sum of one value from column B & and one value from column C but values are not in same rows, and they are not linked, so i want to highlight all three cells, is there any formula that can find and highlight the all three values from three columns.

thank you

Hello KHANGUL01 and Welcome to Excel Forum.
This proposal assumes that there will only be one value in A that will be the sum of one of the values in B and one of the values in C.
This proposal employs a number of helper columns (F:L) which may be moved and/or hidden for aesthetic purposes.
The values from C are transposed into row 1 using: =INDEX($D2:$D5,COLUMNS($A1:A1))
The value in B and the value in C that sum to one of the values in A is identified using: =MATCH(SUM($C2,F$1),$A$2:$A$5,0)
The conditional formatting for B is: =SUMPRODUCT(--ISNUMBER(F2:I2))
The conditional formatting for C is: =SUMPRODUCT(--ISNUMBER(INDEX(F$2:I$5,,ROWS(A$1:A1))))
In order to find the value in A two additional columns (K:L) are employed.
Column K is populated using: =IF(SUMPRODUCT(--ISNUMBER(F2:I2)),C2,"")
Column L is populated using: =IF(SUMPRODUCT(--ISNUMBER(INDEX(F$2:I$5,,ROWS(A$1:A1)))),D2,"")
The conditional formatting for A is: =A2=SUM(K$2:K$5,L$2:L$5)
For future reference you will usually get faster results if you upload an .xlsx file as opposed to a screenshot.
Let us know if you have any questions.