Question 334974
0.63B + 0.37N = -8.4  (equation 1)
0.56B  + 0.44N = -6.6  (equation 2)
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Solving equation 1 for N:
0.63B + 0.37N = -8.4
0.37N = -0.63B-8.4
Divide both sides by 0.37:
N = (-0.63B-8.4)/0.37
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Substitute the above into equation 2 and solve for B:
0.56B  + 0.44N = -6.6
0.56B  + 0.44(-0.63B-8.4)/0.37 = -6.6
0.56B  + 1.189(-0.63B-8.4) = -6.6
0.56B  - 0.75B - 9.99 = -6.6
-0.19B - 9.99 = -6.6
-0.19B = 3.39
B = -17.84
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Substitute the above into equation 1 and solve for N:
0.63B + 0.37N = -8.4
0.63(-17.84) + 0.37N = -8.4
0.63(-17.84) + 0.37N = -8.4
-11.24  + 0.37N = -8.4
0.37N = 2.84
N = 7.68