2x+4y=10 and 3x+7=y by substitution method

x=-9/7, y=22/7

Step-by-step explanation:

Since we're using substitution, and the second equation already has the y isolated on one side, we just substitute the 'y' in 4y from the first equation with the right side of the second equation, which gets us 2x+4(3x+7)=10. Then, we simplify to get that x=-9/7. Now, we use substitution again to replace the x value in the second equation to get y. So 3(-9/7)+7=y, y=22/7.

Final x=-9/7, y=22/7

I hope this helped! :D