SOLUTION: PLS HELP ME SOLVE THIS SIMULTANOUS EQUATION:USE ELIMINATION METHOD TO SOLVE 8y+42=7, 6y-8z=41

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Question 1210544: PLS HELP ME SOLVE THIS SIMULTANOUS EQUATION:USE ELIMINATION METHOD TO SOLVE 8y+42=7, 6y-8z=41
Answer by josgarithmetic(39733) About Me  (Show Source):
You can put this solution on YOUR website!
I assume you accidentally wrote 42 instead of 4z in the first equation.

system%288y%2B4z=7%2C6y-8z=41%29

Multiply first by 2 and add parts.
system%2816y%2B8z=14%2C6y-8z=41%29

22y=55

2y=5

highlight%28y=5%2F2%29

The other variable, y try this:
system%283%288y%2B4z%29=3%2A7%2C4%286y-8z%29=4%2A41%29
You continue.