Answers

2015-03-18T14:35:52+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Here's\ the\ solution; \\ \\ Elimination\ method; \\ \\ 3x-\not{y}=5\to equation\ 1 \\ 2x+\not{y}=10\to equation\ 2 \\ ^{--------} \\  \frac{\not5x}{\not5}=\frac{15}{5} \\ \\ \boxed{x=3} \\ \\ Solving\ for\ y: \\ by\ using\ equation\ 1 \\ \\ 3x-y=5 \\ \\ 3(3)-y=5\ \ \ \ \ \ \ \ |\ Substitute\ x\to3 \\ \\ 9-y=5 \\ \\ -y=5-9 \\ \\  \frac{-y}{-1}=\frac{-4}{-1} \\ \\ \boxed{y=4}

You\ can\ use\ equation\ 2\ if\ you\ want\ too\ in\ finding \\ the\ value\ of\ y. \\ Well,\ here's\ the\ solution\ by\ using\ equation\ 2. \\ \\ 2x+y=10 \\ \\ 2(3)+y=10\ \ \ \ \ \ \ \ \ |\ Substitute\ x\to3 \\ \\ 6+y=10 \\ \\ y=10-6 \\ \\ \boxed{y=4} \\ \\ \\ Conclusion: \\ Therefore,\ the\ value\ of\ x\ and\ y\ is\ 3\ and\ 4\ respectively. \\ \\ Hope\ it\ Helps\ :) \\ Domini
0
-y=5-9
y=4
There, I use substitution method on checking..
Hope it Helps =0
Domini
2015-03-19T00:15:26+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
3x-y=5
2x+y=10

Add the 2 equations:
5x=15
Divide both sides by 5
x=3

Now, substitute the value of x to any equation
2x+y=10
2(3)+y=10
6+y=10
Subtract both sides by 6
y=4

To check(substitute the values):
2x+y=10
2(3)+4=10
6+4=10
10=10

Another equation:
3x-y=5
3(3)-4=5
9-4=5
5=5

Therefore the values are correct... Hope this helps =)
0