Mathematics
brizeidaitzel
5

Solve for x,y, and z

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(1) Answers
MarlaSom

Equation 1)  3x + 2y - 5z = 3 Equation 2)  4x - 2y - 3z = -10 Equation 3)  5x - 2y - 2z = -11 Add equation 1 with equation 2. Equation 4)  7x - 8z = 7 Then subtract equation 3 from equation 2. Equation 5)  -x -z = 1 Multiply all of equation 5 with 7. 5)  -7x - 7z = 7 4)  7x - 8z = 7 Add equations together. z = 14 Plug in 14 for z in equation 4. 7x - 8z = 7 7x - 8(14) = 7 7x - 112 = 7 7x = 119 x = 17 Plug in 17 for x in equation 1, and 14 for z. 1)  3x + 2y - 5z = 3 3(17) + 2y - 5(14) = 3 51 + 2y - 70 = 3 2y - 19 = 3 2y = 22 y = 11 So, x = 17, y = 11, and z = 14 ~Hope I helped!~

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