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3 years ago

Please help as much as you can :)

Mathematics

1 answer:

pantera1 [17]3 years ago

6 0

9514 1404 393

Answer:

(x, y) = (3, 7)

Step-by-step explanation:

If you divide the second equation by 2, it becomes ...

-x +2y = 11

Adding this to the first equation gives you the value of y:

(x -y) +(-x +2y) = (-4) +(11)

y = 7 . . . . . . . . simplify

The first equation can be rearranged to give an expression for x:

x = y -4

x = 7 -4 = 3

Then the solution is seen to be (x, y) = (3, 7).

Personally, I like a graphing calculator for a quick and easy solution to many linear systems. (If the solutions are non-integers, it may not be so helpful.)

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Answer:

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Step-by-step explanation:

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Answer:

By exterior angle theorem, we have;

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By addition property of equality, we have

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