Now that we know the value of \(p\), we can find the value of \(q\) by substituting 20.2 for \(p\) in either of the original equations and solving the equation. Solving Systems of Equations by Substitution Date Period Solve each system by substitution. Trying to solve two equations each with the same two unknown variables Take one of the equations and solve it for one of the variables. 3-cross multiply each equation using the variables. 2-find the co-efficient of each variable. Doing this gives us an equation with only one variable, \(p\), and makes it possible to find \(p\). I know three easy steps to solve these type of equations by elimination method: 1- equation must always start with the same variable. Rewriting the original equation this way allows us to isolate the variable \(q\).īecause \(q\) is equal to \(71-3p\), we can substitute the expression \(71-3p\) in the place of \(q\) in the second equation. If we subtract \(3p\) from each side of the first equation, \(3p q = 71\), we get an equivalent equation: \(q= 71 - 3p\). Another way to solve systems of linear equations is by SUBSTITUTION. Instead of solving by graphing, we can solve the system algebraically. The solution to a system of linear equation occurs where the two lines intersect.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |