Solve the following system of equations. enter the y-coordinate of the solution. round your answer to the nearest tenth. 5x+2y=21 -2x+6y=-34

We could solve for 'x' in the 2nd equation and then plug that into the first equation for 'x' and solve for 'y':



Subtract 6y to both sides:



Divide -2 to both sides:



Plug in 3y + 17 for 'x' in the first equation:





Distribute 5:



Combine like terms:



Subtract 85 to both sides:



Divide 17 to both sides:



This is the y-coordinate of the solution.

It will take him 5 days