Question

anyone know what2.4z+1.2z-6.5=0.7

Answer 1

2.4z + 1.2z - 6.5 = 0.7
Solve for z, by isolating the variable.
3.6z - 6.5 = 0.7
3.6z = 0.7 + 6.5
3.6z = 7.2
z = 7.2/3.6
z = 2

Answer 2

you are trying to solve for Z 
so now you will do is add like terms 
2.4z+1.2z=3.6
now you have 
3.6z-6.5=0.7
now you will add
6.5+0.7=7.2
now you will have
3.6z=7.2
now you will divide 
7.2/3.6=2
so now you have 
z=2
that is all you have to do for salving for z
hope that this helps you