Question

3x + 7y = 3 and 12x + 28y = 16
Use either elimination or substitution to find the solutions (if any).

Answer 1

You can simplify 2nd equation:
divide both sides by 4:
\[3x+7y=4\]
as you can see, the 1st equations left side is the same as 2nds equations left side but right sides are different. That means that there is no solution for this system.

Answer 2

You can simplify 2nd equation: divide both sides by 4:
3x+7y=4
as you can see, the 1st equations left side is the same as 2nds equations left side but right sides are different. That means that there is no solution for this system.

Answer 3

Thanks