Question

Solve the following system of equations. Enter the y-coordinate of the solution. Round your answer to the nearest tenth 5x+2y=7 -2x+6y=9 is it (0.7,1.7)??

Answer 1

5x + 2y = 7 ...multiply by -3
-2x + 6y = 9
-----------------
-15x - 6y = -21 (result of multiplying by -3)
-2x + 6y = 9
-----------------add
-17x = - 12
x = 12/17 or 0.7

5x + 2y = 7
5(12/17) + 2y = 7
60/17 + 2y = 7
2y = 7 - 60/17
2y = 119/17 - 60/17
2y = 59/17
y = (59/17) / 2
y = 59/17 * 1/2
y = 59/34 or 1.7

(0.7,1.7) is the solution to the equation....the question is asking for the y coordinate....it is 1.7 <==