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Alenkinab [10]
3 years ago
15

Find the value of x.

Mathematics
2 answers:
SCORPION-xisa [38]3 years ago
6 0

Answer:

81 degrees

Step-by-step explanation:

Digiron [165]3 years ago
6 0

Step-by-step explanation:

Here,

X+128+100+51=360

X+279=360

X=360-279

:.x=81

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zhuklara [117]

Answer: D (5/2, -17/4)

Step-by-step explanation:  Using elimination your goal is to get rid or 1 variable  so you can solve for the one that's left.  By adding the -2y and 2y you will get 0.  You will also add the 3x+x (4x) and -1+11 (10).  You have now gotten rid of the y and have 4x=10.  By dividing each side by 4 we now know x =2.5.  D is the only possible solution with x=2.5 (5/2) but to solve for y you plug 2.5 in to an equation as x so) x-2y=11

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                                                                            -2y=8.5                                                                        Answer D (5/2,-17/4)                                      y=-17/4 (4.25)

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