Question

How do you solve `3.9z + 12.26- 10.7z = - 11.1z - 8.81`?

Answer 1

Arrange the equation. `z= -4.9`

Explanation:

`3.9z - 10.7z + 11.1z = -8.81 - 12.26`

`15 z - 10.7 z = -21.07`

`4.3z = -21.07`

`z= -21.07/4.3 = -4.9`

Answer 2

z= -4.90

Explanation:

`39/10z + 1226/100 - 107/10z = -111/10z- 881/100`

`(-68 + 111)/10z = (-881-1226)/100`

`43/10z = -2107/100`

`z = -2107/100 * 10/43`

`z = -4.90000`

Answer 3

`z=-4.9=` extraneous solution.

Explanation:

`3.9z+12.26-10.7z=-11.1z-8.81`

`:.3.9z-10.7z+11.1z=-8.81-12.26`

`:.4.3z=-21.07`

`:.z=-21.07/4.3`

`:.z=-4.9`

~~~~~~~~~~~~~~~~~~

check:-

substitute `z=-4.9`

`:.3.9(-4.9)+12.26-10.7(-4.9)=11.1(-4.9)-8.81`

`:.-19.11+12.26+52.43=-54.39-8.81`

`:.45.58=-63.2`

L.H.S not equal to R.H.S

:.= A extraneous solotion