Answer
z= 4.3
Work Step by Step
8.4z -2.6 =5.4z +10.3 Add 2.6 to both sides
8.4z -2.6+2.6 =5.4z +10.3+2.6
8.4z =5.4z +12.9 Subtract 5.4z from both sides
8.4z-5.4z =5.4z +12.9 -5.4z
3z=12.9
$\frac{3z}{3}$=$\frac{12.9}{3}$
z=4.3
Check
Replace z with 4.3
8.4z -2.6 =5.4z +10.3
8.4$\times$4.3 -2.6 =5.4$\times$4.3 +10.3
36.12 -2.6=23.22+10.3
33.52=33.52