Bone density and thinning of bone tissue. Choose...

x-4y=-11<=> -5x + 20y = 55 5x - 7y = -10 =>0 x + 13 y = 45 => y =45/13 => x = 4*(45/13) -11 = 180/13 -11 => x = 37/13;

Answered by crisforp | 2024-06-10

Using elimination, we transformed the equations to eliminate one variable, leading to values of x = 13 37 ​ and y = 13 45 ​ . First, we multiplied the first equation to align coefficients, then subtracted to isolate y . Finally, we substituted back into one of the original equations to find x .
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Answered by crisforp | 2024-12-20