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Lena [83]
1 year ago
5

Find the value of each variable. 2(5x5)° (5y + 5)° 20yº (3x - 5)°

Mathematics
1 answer:
Elena-2011 [213]1 year ago
6 0

Answer:

2(5x - 5) + (3x - 5) = 180 \\ 10x - 10 + 3x - 5 = 180 \\ 10x + 3x = 180 + 10 + 5 \\ 13x = 195 \\  \frac{13x}{13}  =  \frac{195}{13}  \\ x = 15

5y + 5 + 20y = 180 \\ 5y + 20y = 180 - 5 \\ 25y = 175 \\  \frac{25y}{25}  =  \frac{175}{25}  \\ y = 7

THE REASON IS THAT ANGLES ON A STRAIGHT LINE ARE SUPPLEMENTARY

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