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2 answers:
Answer:
∠3 measures 113°
Step-by-step explanation:
These are consecutive interior angles. It's difficult to explain in words because none of the lines are marked in any way, but I marked the angles in the attached image. Because both downward facing lines are parallel, both sets of corresponding red and blue angles are congruent.
∠3 corresponds to the angle supplementary to the 67° angle. Supplementary angles add up to 180°, so ∠3 and 67° also have to add up to 180°. Hopefully my image makes that a little more clear.
∠3 measures 113°
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David and Almudena have between the two 225 euros. Calculate how much money each has if Almudena has 75 euros more than David.
For this case we propose a system of equations:
x: Let the variable that represents Almudena's amount of money
y: Let the variable that represents David's amount of money
According to the statement we have:
Substituting the second equation into the first:
We find the value of the variable x:
Almudena has 150 euros
David has 75 euros
Answer:
Almudena has 150 euros
David has 75 euros