$-11$ is the root of equation $4y-68=-40$.

Write the equation and find out the answer.

Six added to a number $x$ is equal to $10$. What is the number?

Write the equation and find out the answer.

Write the equation and find out the answer.

Write the equation and find out the answer.

Solve the following equation by trial and error method.

$x+5=20.$

Solve the following equation by trial and error method.

$y-5=30.$

Solve the following equation by trial and error method.

$3z=18.$

Solve the following equation by trial and error method.

$x+\frac{5}{2}=10.$