nsbegay2007
30.03.2020 •
Mathematics
In order to solve the following system equations by addition which of the following cool you do before adding the question so that one variable will be eliminated when you’re at them
2x-4y=5
6x-3y=10
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Ответ:
y=-5/9 and x=25/18
Step-by-step explanation:
2x-4y=5
6x-3y=10
Multiple the top by -3
-6x+12y=-15
6x-3y=10
Add both equations
9y=-5
y=-5/9
Plug in y to any equation to find x
6x-3(-5/9)=10
6x+5/3=10
Multiple by 3
18x+5=30
18x=25
x=25/18
Watch out for negative signs
Ответ:
the answer would be 0.54