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hammer [34]
3 years ago
9

A and B are supplementary angles. If A = 7x - 18 and B = 8x + 3, find x.

Mathematics
1 answer:
Mila [183]3 years ago
3 0

Answer:

x=13

Step-by-step explanation:

Angle A and angle B are supplementary

Supplementary angles add to 180 degrees

<A + <B = 180

7x-18 + 8x+3 = 180

Combine like terms

15x -15 = 180

Add 15 to each side

15x-15 +15 = 180+15

15x = 195

Divide by 15

15x/15 =195/15

x =13

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