Linear Equations Given as Formulas Help
Introduction to Linear Equations Given as Formulas
At times math students are given a formula like I = Prt and asked to solve for one of the variables; that is, to isolate that particular variable on one side of the equation. In I = Prt , the equation is solved for “ I .” The method used above for solving for x works on these, too. Many people are confused by the presence of multiple variables. The trick is to think of the variable for which you are trying to solve as x and all of the other variables as fixed numbers. For instance, if you were asked to solve for r in I = Prt , think of how you would solve something of the same form with numbers, say
The steps for solving for r in I = Prt are identical.
All of the formulas used in the following examples and practice problems are formulas used in business, science, and mathematics.
Solve for q.
Solve for m .
Solve for C.
Solve for b .
Linear Equatinos Given as Formulas Practice Problems
Solve for indicated variable.
4. P = 2 L + 2 W ; L
5. L = L 0 [1 + a ( dt ); a
6. S = C + RC; C
7. A = P + PRT; R
9. L = a +( n – 1) d; n
Practice problems for these concepts can be found at: Algebra Linear Equations Practice Test.
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