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schepotkina [342]
2 years ago
7

Find the value of x.

Mathematics
1 answer:
Karolina [17]2 years ago
6 0

Answer:

x=21

Step-by-step explanation:

Following the vertical angles, we can assume that the equation that has x and 87 are equal to each other. From then, you set them equal to each other and solve for x.

87=4x+3

84=4x                  subtract 3 from both sides

21=x                     divide by 4 to get the x alone on both sides

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