James is solving the system below:
-4x + 8y = 10
7x + 9y = 19
He wants to eliminate x and said that he needs to multiply the first equation by 8 and the second equation by 3. Is this correct? Justify your answer. If incorrect, describe the error.

Question

James is solving the system below:
-4x + 8y = 10
7x + 9y = 19
He wants to eliminate x and said that he needs to multiply the first equation by 8 and the second equation by 3.  Is this correct?  Justify your answer.   If incorrect, describe the error.

anonymous · Answer

I just showed you what you have to do lol, just multiply through 8 on the first equation, and multiply through by 3 on the second and if the x's are of opposite of each other it's correct.

anonymous · Answer

$$8(-4x+8y=10) \implies -32x+64y=80$$ now do the same with the second equation except multiply by 3.

anonymous · Answer

So give that a try and post it here, and I'll help you with the next part ^.^

anonymous · Answer

hey thanks i got it right...i just lost connection

anonymous · Answer

Yeah I got that to haha, no worries. Glad you got it right :)