stephaniedtel stephaniedtel

24-03-2018
Mathematics

contestada

solve the linear equation with any method.
4x-7y=18
9x+14y=40

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sqdancefan sqdancefan

29-03-2018

Cramer's rule seems appropriate for this, since the graph shows fractions with unusual denominators.
x = (-7*40 -14*18)/(-7*9 -4*14) = -532/-119 = 4 8/17
y = (18*9 -40*4)/-119 = -2/119

(x, y) = (76/17, -2/119)

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