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aleksandr82 [10.1K]
3 years ago
7

I need help please it is just one question and can you explain how u did it thx please look at the picture thx

Mathematics
1 answer:
valina [46]3 years ago
7 0

Answer:

112

Step-by-step explanation:

A supplementary angle is 1 or more angles that add up to 180 degrees. So, the 2 angles we have are 2x and 3x + 10, and those add up to 180.

In order to make an equation for this, we need to add 2x and 3x + 10 and equal it to 180.

5x + 10 = 180

Now that we have our equation, the goal is to isolate the variable. The most immediate step I see is to subtract 10 from both sides so 5x will be alone on one side of the equation.

5x = 170

Now, to ultimately isolate the variable, we must divide both sides by 5 so that x will be alone.

170 / 5 is 34

5x / 5 is x

x = 34

Now, we plug in our value of x into 3x + 10 to find out what the measurement is equal to.

3(34) + 10 = y

102 + 10 = y

112 = y

3x + 10 is equal to 112.

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