Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.

3x+7y=77
-2x +7y=42

Question

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.

3x+7y=77
-2x +7y=42

anonymous · Answer

can you show me how to do this?

saifoo.khan · Answer

i can do that with my calc.

katrinakaif · Answer

First distribute a negative to the second equation meaning: 
-(-2x + 7y) = 42(-) 
then you get +2x - 7y = - 42 
Cancel out the -7y and +7y from the equation above giving us 0 
Then solve for x meaning add 3x and 2x = 5x 
Also substract 77 and 42 
5x = 35 
Then solve for x and plug in to the other equation to get y

anonymous · Answer

can you tell me how to? I don't rember how to do this?

anonymous · Answer

x=7 y=8