Solving Simple Equations - ISEE Lower Level Mathematics Achievement

1. What operation should you use to undo multiplying by $5$ in the equation $5x = 30$?

   Divide both sides by $5$. To isolate $x$, perform the inverse operation of multiplication by dividing both sides by $5$, preserving equality.

2. What is the solution for $x$ in the equation $6x = 42$?

   $x = 7$. Divide both sides by $6$ to isolate $x$, which reverses the multiplication.

3. What operation should you use to undo adding $7$ in the equation $x + 7 = 12$?

   Subtract $7$ from both sides. To isolate $x$, perform the inverse operation of addition by subtracting $7$ from both sides, maintaining the equation's balance.

4. What is the solution for $x$ in the equation $x - 4 = 11$?

   $x = 15$. Add $4$ to both sides to isolate $x$, reversing the subtraction and finding the value.

5. What is the solution for $x$ in the equation $9 - x = 2$?

   $x = 7$. Subtract $9$ from both sides, then multiply by $-1$ to isolate $x$.

6. What is the solution for $x$ in the equation $x + 9 = 15$?

   $x = 6$. Subtract $9$ from both sides to isolate $x$, as this undoes the addition and solves the equation.

7. What is the solution for $x$ in the equation $\frac{x}{8} = 3$?

   $x = 24$. Multiply both sides by $8$ to isolate $x$, undoing the division.

8. What is the solution for $x$ in the equation $0.5x = 9$?

   $x = 18$. Divide both sides by $0.5$, which is equivalent to multiplying by $2$, to isolate $x$.

9. What is the solution for $x$ in the equation $x + x = 14$?

   $x = 7$. Combine like terms to get $2x = 14$, then divide both sides by $2$ to isolate $x$.

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