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Isla Archer
Mathematics
2 May, 17:58
Three solutions for 5x+7y=19
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Frau Frau
2 May, 18:04
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Just sub in ANY number for x and solve for y
5x + 7y = 19 ... lets say x = 0
5 (0) + 7y = 19
7y = 19
y = 19/7 ... so when x = 0, y = 19/7 ... (0,19/7)
5x + 7y = 19 ... lets say x = 1
5 (1) + 7y = 19
5 + 7y = 19
7y = 19 - 5
7y = 14
y = 14/7
y = 2 ... so when x = 1, y = 2 ... (1,2)
5x + 7y = 19 ... lets say x = 3
5 (3) + 7y = 19
15 + 7y = 19
7y = 19 - 15
7y = 4
y = 4/7 ... so when x = 3, y = 4/7 ... (3,4/7)
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