Quandaries and Queries
I hope that u can help me....I
am a college student taking a class in Pre Calculus.....I have homework
due this Friday and it counts a BIG Percentage on my FINAL grade.....I
am getting mixed up and can not figure out a few problems.....Please help
Since this is such a big homework assignment I am not going to do the problems for you but I will show you solutions to similar problems.
Method of Substitution.
Since y + 2x = 3, y = 3 - 2x
Thus, substituting into the second equation
Thus x = 2/3 or x = 1.
Substitute these values back into he first equation to find the corresponding values of y.
Method of elimination.
Multiply the second equation by 4. This will make the coefficients of x equal in both equations.
Now subtract the second equation from the first. This gives
Thus y = -3/14
Substitute this value back into one of the two equations to find the corresponding value of x.
For both of these problems you should check your answers.