Question

solve the system of linear equation in three variables x + y + z=89, y = 3z, x=z- 6​

Answer 1

Step-by-step explanation:

x+y+z = 89

z-6+3z+z = 89

5z-6 = 89

5z = 95

z = 19

So, y = 3*19 = 75

and, x = 19 -6 = 13

So, the x= 13, y= 75 and z = 19 [Ans.]

I hope it may help you.