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# Find the value of x and y?

17x-y+12x+4y+90=180

And

4x+y+6x-y+130=180

Its about tringles c: thanks and explain!

### 1 Answer

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- Magic OneLv 68 years agoFavorite Answer
First of all let's simplfy:

17x - y + 12x + 4y + 90 = 180

29x + 3y + 90 = 180

4x + y + 6x - y + 130 = 180

10x + 130 = 180

Since x is isolated in equation 2, we solve for x:

10x + 130 = 180

10x = 50

x = 5

Now we substitute x in the first equation to determine y:

29 * 5 + 3y + 90 = 180

145 + 3y + 90 = 180

235 + 3y = 180

3y = -55

y = -18.33

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