Question

solve the following by trial and error method (i) 5u + 23=3​

Answer 1

Answer:

5u+23=3(u+9)

We move all terms to the left:

5u+23-(3(u+9))=0

We calculate terms in parentheses: -(3(u+9)), so:

3(u+9)

We multiply parentheses

3u+27

Back to the equation:

-(3u+27)

Answer 2

Answer:

Substituting different values of the variable and checking the equality of LHS and RHS is the trial and error method. Let us solve the equation 3x + 5 = 17.