Hey There! :)
To Solve for t.
[tex]h(t)=7(t-25)[/tex]
Distribute the brackets.
[tex]h(t)=7*t-7*25[/tex]
[tex]h(t)=7t-175[/tex]
Subtract 7t from both sides.
[tex](h(t))-7t=(7t-175)-7t[/tex]
[tex](h(t)-7t=-175[/tex]
[tex]h*t-7t=-175[/tex]
Factor out variable, t.
[tex]t(h-7)=-175[/tex]
Divide both sides by h-7.
[tex](t(h-7))/h-7=(-175)/h-7[/tex]
[tex]t=-175/h-7[/tex]
Hope this helps!
-Benjamin