Say we solve the second equation for 2 z. Get 2 z = − 7 − 3 x − 4 y. Then substitute that into the first equation: 5 x + 2 y − 7 − 3 x − 4 y = − 19. So, simplifying, we get x − y = − 6. To
It also gives you instructions on how to do that specific question, thank You, This app! EDIT: Thank you, it's good enough now, this is wonderful for any math that you stuck with 😀. This is a great app i hope This app wont make an update that you need to pay money.