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AfilCa [17]
3 years ago
10

2x - y - 4 = 0 3x + y - 9 = 0

Mathematics
1 answer:
stich3 [128]3 years ago
6 0

Step-by-step explanation:

add up both equations

2x -y + 3x + y -13 = 0 (y will eliminate -y)

5x -13 = 0

5x = 13

x = 13/5 now use this value to find y

2 × 13/5 -y - 4 = 0

26/5 - y -4 = 0

26/5 - 4 = y

6/5 = y

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x+42+2x+1=180

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