Practice Problem #5
Solve for x: 3x + 2y = 5
In this type of problem, we need to isolate x. Start by moving any terms on the same side of the equation to the other side.
3x + 2y = 5
3x = 5 + _____
Now, divide by the coefficient for the final answer.
3x + 2y = 5
3x = 5 -2y
Practice Problem #6
Solve: E = mc2 for m
We need to get m alone on the right side of the equation. What should we do?
- Add
- Aubtract
- Multiply
- Divide
Good, we should divide. What do we need to divide by?
Great! So, our answer is 
Practice Problem #7
Solve: a2 + b2 = c2 for b.
b2 = c2 - _____ 2
Now, simplify and find the square root. Which is the correct answer?
Answer: 
