Even if you dont want to stud. Balancing equations requires some practice on your part as well as some common sense. Eg Fe 2 SO 4 3 contains 2 Fe atoms 3 S atoms and 12 O atoms.
You must remember to multiply the subscripts of atoms inside the parentheses by the subscripts outside the parentheses.
Do this for each side of the equation. If you find yourself using very large coefficients or if you have spent several minutes without success go back and make sure that you have written the. You balance an equation with parentheses the same way as with other equations. Youre going to have to balance over and over and youre going to go into this really really really confusing circle.