EXERCISE 7.1

Solve the following equation by the trial and error method.

$6x+1=13$

Solve the following equation by the trial and error method.

$5x-3=12$

Solve the following equation by the trial and error method.

$\frac{x}{2}-1=0$

Solve the following equation by the trial and error method.

$11x+1=12$

Set up the following case as equation.
The age of Sunil is $48$ years. His age is $3$ years less than $3$ times the age of his daughter.

Set up the following case as equation.
There are $48$ red beads in a packet. The number of red beads in the packet is $8$ more than $5$ times the number of white beads.

Set up the following cases as equations.
Atul got $8$ marks more in maths than in science. His total marks in maths and science were $178$.

Set up the following cases as equations.
There are $64$ students in a class. The number of boys in the class is $12$ more than the number of girls in the class.