Question

Solve for x, y and z
3x – 3y + 5z = 13
5x + 6y – 2z = 10
7x + 5y = 18

Answer 1

3x – 3y + 5z = 13

x = 13/3 + y - 5z/3

y = - 13/3 + x + 5z/3

z = 13/5 - 3x/5 + 3y/5

5x + 6y – 2z = 10

x = 2 - 6y/5 + 2z/5

y = 5/3 - 5x/6 + z/3

z = -5 + 5x/2 + 3y

7x + 5y = 18

x = 18/7 - 5y/7

y = 18/5 - 7x/5