How do you solve 3.9z + 12.26- 10.7z = - 11.1z - 8.813.9z+12.26−10.7z=−11.1z−8.81?

3 Answers
G_Ozdilek
Nov 20, 2017

Arrange the equation. z= -4.9z=−4.9

Explanation:

3.9z - 10.7z + 11.1z = -8.81 - 12.263.9z−10.7z+11.1z=−8.81−12.26

15 z - 10.7 z = -21.0715z−10.7z=−21.07

4.3z = -21.074.3z=−21.07

z= -21.07/4.3 = -4.9z=−21.074.3=−4.9

SammiekattMSP
Nov 20, 2017

z= -4.90

Explanation:

39/10z + 1226/100 - 107/10z = -111/10z- 881/1003910z+1226100−10710z=−11110z−881100

(-68 + 111)/10z = (-881-1226)/100−68+11110z=−881−1226100

43/10z = -2107/1004310z=−2107100

z = -2107/100 * 10/43z=−2107100⋅1043

z = -4.90000z=−4.90000

Barney V.
Nov 20, 2017

z=-4.9=z=−4.9= extraneous solution.

Explanation:

3.9z+12.26-10.7z=-11.1z-8.813.9z+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

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