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Mathematics
Jacoby Huynh
25 June, 20:13
4x-7y=10 y=x-7 using the substitution method
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Jerimiah Petersen
25 June, 22:49
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Y = x - 7 ... so we sub in x - 7 for y in the other equation
4x - 7y = 10
4x - 7 (x - 7) = 10
4x - 7x + 49 = 10
4x - 7x = 10 - 49
-3x = - 39
x = - 39/-3
x = 13
y = x - 7
y = 13 - 7
y = 6
solution is (13,6)
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