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3 years ago

Whats the solution for 7x−y=7 x+2y=6

1 answer:

6 0

Multiply the first equation by 2 to then use elimination by adding the 2 equations.
So, 14x-2y=14
+. x+2y=6

Equals 15x=20 so x=20/15=4/3

Plug in to first equation to get y
7(4/3)-y=7
28/3-y=7
28/3-y=21/3
So y=7/3

Plug both x and y into second equation to check
4/3+2(7/3)=
4/3+14/3=18/3=6 it works

So x=4/3, y=7/3

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3 years ago

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4 years ago

9. A blueprint of a house plan uses a scale in

nata0808 [166]

Answer:

The length on the blueprint for an actual length of 65 feet is $16\frac{1}{4}\ inches$

Step-by-step explanation:

Given:

Scale of the blueprint is $\frac{1}{4}\ in=1\ foot$

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Now, as per given data;

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3 years ago

Whats the solution for 7x−y=7 x+2y=6 ​

Whats the solution for 7x−y=7 x+2y=6