8.05 Solving two-step equations
Interactive practice questions
Consider the equation $3p+6=21$3p+6=21.
If we want to make $p$p the subject of the equation, what is the first step we should take?
Divide both sides by $3$3 to find the value of $p+6$p+6.
Subtract $6$6 from only the left-hand side of the equation.
Divide only the left-hand side of the equation by $3$3.
Subtract $6$6 from both sides to find the value of $3p$3p.
What is the second step we should take to make $p$p the subject?
Divide both sides by $3$3 to find the value of $p$p.
Add $6$6 to only the left-hand side of the equation.
Add $6$6 to both sides to find the value of $3p+6$3p+6.
Divide only the left-hand side of the equation by $3$3.
Apply the steps found in parts (a) and (b) to find the solution to the equation.
Enter each line of working as an equation.
Consider the equation $\frac{y}{8}+3=5$y8+3=5.
Consider the equation $5\left(n-7\right)=35$5(n−7)=35.
Consider the equation $10\left(p+10\right)=120$10(p+10)=120.