# algebra

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solve for the indicated variable:

a. temperature formula
solve for F: K=5/9(F-32)+273

b. annual interest rate
solve for R: A=P+Prt

• algebra -

K=5/9(F-32)+273
K-273=5/9(F-32)
9(K-273)=5(F-32)
9K-2457=5F-160
9K-2457+160=5F
(9K-2297)/5 = F

A=P + Prt
A-P=Prt
(A-P)/Pt = r
Check my work carefully.

• algebra -

\$67×20=36 (x÷80)

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