Question 184629: I need help to solve this problem.
Solve the systems of equations by substitutions
5x + y = 9
y=4x Type an ordered pair. Answer by solver91311(24713) (Show Source):
Since you have an equation that expresses y in terms of x, just substitute the expression containing x into the other equation, thus:
Solve for x to get your x-coordinate, and then substitute that value back into either of the equations and solve for the y-coordinate. Express your answer as (x,y) once you have the proper values.
