Find the value of x really need !

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Find the value of x really need !

Find the value of x really need !

x=-7

Step-by-step explanation:

The sum of the angles of a triangle are 180 degrees

40 + x+57 + 90 =180

Combine like terms

187 +x = 180

Subtract 187 from each side

187-187 +x = 180-187

x = -7

Set everything equal to 360:

(2x-61)+(x-17)+3x=360

6x-78=360

6x=282

x=47

X is 73.

you can make an equation to find x

[tex]3x + 2x - 61 + x - 17 = 360 \\ 3x + 2x + x = 360 + 61 + 17 \\ 6x = 438[/tex]

[tex]x = \frac{438}{6} = 73[/tex]

good luck