Answer :

Sure! Let's solve the equation [tex]\( 21 - 3y = 36 - 6y \)[/tex] step by step to find the value of [tex]\( y \)[/tex].

1. Start with the given equation:

[tex]\[ 21 - 3y = 36 - 6y \][/tex]

2. Add [tex]\( 6y \)[/tex] to both sides of the equation to get all the [tex]\( y \)[/tex] terms on one side:

[tex]\[ 21 - 3y + 6y = 36 - 6y + 6y \][/tex]

3. Simplify the equation:

[tex]\[ 21 + 3y = 36 \][/tex]

4. Subtract 21 from both sides of the equation to isolate the term with [tex]\( y \)[/tex]:

[tex]\[ 21 + 3y - 21 = 36 - 21 \][/tex]

5. Simplify:

[tex]\[ 3y = 15 \][/tex]

6. Divide both sides by 3 to solve for [tex]\( y \)[/tex]:

[tex]\[ y = \frac{15}{3} \][/tex]

7. Simplify:

[tex]\[ y = 5 \][/tex]

Therefore, the solution to the equation [tex]\( 21 - 3y = 36 - 6y \)[/tex] is [tex]\( y = 5 \)[/tex].