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Anna71 [15]
3 years ago
12

(2x+y=-2 5x + 3y = -8 Solve by elimination

Mathematics
1 answer:
Effectus [21]3 years ago
8 0

Answer:

y = -6, x =2

Step-by-step explanation:

To solve by elimination, you have to line both equations up together. Then, you multiply both equations until one variable is removed.

2x+y = -2

5x + 3y = - 8

There are many different ways to solve an elimination problem, but generally you should look for the simplest route. Here, I would multiply the top equation by -3.

-6x -3y = 6

5x +3y = -8

Imagine you are adding the two equations together. You end up with

-x = -2

Then solve for x. In this situation, it is fairly simple. Take out a factor of -1.

x = 2

Finally, choose one of your beginning equations and plug your new-found x value back into the equation.

2(2) +y = -2

4 + y = -2

y = -6

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sveta [45]

Answer:

m = 116

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Step-by-step explanation:

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That means....

73 + 83 + x = 180

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Another important fact is that two angles that are intersected by a line in the case 64 and m always add up to 180 degrees.

So m + 64 = 180

Let's start with 73 + 83 + x = 180

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x + 156 = 180 then subtract 156 from both sides and

x = 24

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z + 140 = 180 subtract 140 from both sides and

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Check to make sure m + x + z = 180

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