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258+9-5\times 5^{2}=141.9
Multiply both sides of the equation by 3.
258+9-5^{3}=141.9
To multiply powers of the same base, add their exponents. Add 1 and 2 to get 3.
258+9-125=141.9
Calculate 5 to the power of 3 and get 125.
258-116=141.9
Subtract 125 from 9 to get -116.
142=141.9
Subtract 116 from 258 to get 142.
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Compare 142 and 141.9.
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