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Solve and proof for the value of A. 0.3A+(0.2A-0.5)+0.2(A+2)=1.3 I have done this question over and over I keep getting answers like 2 or3.25 but when I sub in thoes answers for A It does not work.

What is the overall stoichiometry for the reaction between iodide and peroxydisulfate ions?

How do I solve this equation? 4^x * (1/2)^3-2x = 8*(2^x)^2