There is possibly a way with tabs but these can be fiddly. However, you could use a table - one row, 2 columns with column 1 wide and centred and column 2 (on the right) narrow - and remove the gridlines afterwards so you can't see it's a table.
Use a 4 column table if you want the equations centred on the = sign, col 1 right justified, = in col 2, col 3 left justified col 4 for your numbers. Adjust column widths until they look ok and then remove the gridlines. Copy and paste the table for further equations so they all look the same. I have used this method for equations. Hope this helps.