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ddd [48]
2 years ago
15

Please someone help me plz help

Mathematics
2 answers:
Yakvenalex [24]2 years ago
4 0
53+78=131
180-131=49
10x-1=49
10x=50
Divide be 10 on each side
X=5
atroni [7]2 years ago
3 0

Answer:

x = 5

Step-by-step explanation:

Angles in a triangle add up to equal 180

Hence, 10x - 1 + 78 + 53 = 180

( Note that we just created an equation that we can use to solve for x )

We now solve for x using the equation we created

10x - 1 + 78 + 53 = 180

Combine like terms

10x + 130 = 180

Subtract 130 from both sides

10x = 50

Divide both sides by 10

x = 5

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