Question

Solve the following algebraic expressions by both trial and error method and balancing equation.
$11+x=13$

Answer 1

Given $11+x=13$

Let $x=1,LHS=11+1=12,RHS=13$

$LHS\ne RHS$

Let $x=2,LHS=11+2=13,RHS=13$

As $LHS=RHS$

By trial and error method

So $x=2$

By balancing equation method

$11+x=13⟹x=13-11=2$