Question

2x + 4=8 3x+5y=15 using elimination

Answer 1

Elimination works by combining the equations and at the same time eliminating one of the variables.
This is done by making sure the coefficient of a variable is the same on both equations but with opposing signs.
Take x for instance, it has coefficient 2 on the first equation and 3 on the second equation.
If you multiply the first equation times 3 and the second times -2 you will have that condition.
Then just add both equations together and you get...