If another range of cells in each sheet meets the requirements, I must add those cells together. The equation is displayed below.
=SUMIF('sheet0'!D3:Q3; "x"; 'sheet0'!D9:P9)+SUMIF('sheet1'!D3:Q3; "x"; sheet1'!D9:P9)+SUMIF('sheet2'!D3:Q3; "x"; 'sheet2'!D9:P9)
I need to do this for more than 50 sheets, and while this works correctly, is there a shorter formula I can write to achieve the same result?