expressions and equations with variables

evaluate when t=28  $\left(t-20\right)\cdot5$  

Evaluate when v=10  $v+\left(v\times4\right)-30$  

Evaluate when a=12 b=8  $\left(a+b\right)\div10+6$  

Evaluate When c=56  $\left(17-10\right)\cdot6+c$  

Evaluate When x=128  $\left(10+6\times5\right)+x$  

Solve Equation  $\left(x+10\right)\cdot10=110$  

Solve Equation  $x+56=100$  

Solve Equation  $\left(5+x\right)-10=50$  

Solve Equation  $\left(5+x\right)\cdot5-20=50$  

Solve Equation  $\left(6+x\right)\cdot x=55$