[tex] \frac{1}{2} s[/tex] = 4s - 21
First, simplify [tex] \frac{1}{2} s[/tex] to [tex] \frac{s}{2} [/tex] / Your problem should look like: [tex] \frac{s}{2} = 4s - 21[/tex]
Second, multiply both sides by 2. / Your problem should look like: [tex]s = 8s - 42[/tex]
Third, subtract 8s from both sides. / Your problem should look like: [tex]s - 8s = -42[/tex]
Fourth, simplify s - 8s to -7s. / Your problem should look like: [tex]-7s = -42[/tex]
Fifth, divide both sides by -7. / Your problem should look like: [tex]s = \frac{-42}{-7} [/tex]
Sixth, simplify [tex] \frac{42}{-7} [/tex] to [tex]- \frac{42}{7} [/tex] / Your problem should look like: [tex]s = \frac{42}{7} [/tex]
Seventh, simplify [tex] \frac{42}{7} [/tex] to 6. / Your problem should look like: [tex]s = 6[/tex]
Answer: s = 6
