Solve for both systems: z+2x=29 and 3z + 2x = 43

z+2x=29

z+2x-2x=29-2x

z=29-2x

3z + 2x = 43

3(29-2x) + 2x = 43

3(29) (3)(-2x) + 2x = 43

87-6x+ 2x = 43

87-4x= 43

87-4x-87= 43-87

-4x=-44

-4x/-4=-44/-4

x=11

z=29-2x

z=29-2(11)

z=29-22=7