Part A. Consider the system of equations
5x+y=31,
-3x+4y=-37
Solve the first equation for y in terms of x. Enter your answer in "y=..."
Part B. Consider the system of equations
5x+y=31,
-3x+4y=-37
Take your expression for y from part a and substitute it into the second equation. Solve for x and y.
Enter your answer as the ordered pair, (x, y)
+37157 5x+y=31, y = 31 - 5x
-3x+4y = - 37
-3 x + 4 ( 31 - 5x) = - 37
-3x + 124 - 20x = - 37
-23x = - 161
x = 161/23 = 7 y = 31 - 5x =31 - 5 (7) = -4
