Solving Two-Step Equations: px + q = r

What is the first step in solving a two-step equation?

• Evaluate exponents

• Undo addition or subtraction

• Undo multiplication or division

• Evaluate parentheses

In the equation 2x + 3 = 9, what operation should be undone first?

• Subtraction

• Addition

• Division

• Multiplication

After subtracting 3 from both sides in the equation 2x + 3 = 9, what is the next step?

• Multiply both sides by 2

• Divide both sides by 2

• Subtract 2 from both sides

• Add 3 to both sides

In the equation -2y - 7 = 3, what is the first operation to undo?

• Divide both sides by -2

• Subtract 7 from both sides

• Add 7 to both sides

• Multiply both sides by -2

What is the value of y in the equation -2y - 7 = 3 after solving?

• 5

• -5

• 2

• -2

In the equation 5x - 3.8 = -6.4, what is the first step to solve for x?

• Multiply both sides by 5

• Subtract 3.8 from both sides

• Divide both sides by 5

• Add 3.8 to both sides

What is the value of x in the equation 5x - 3.8 = -6.4 after solving?

• 0.52

• -0.52

• 1.52

• -1.52

In the equation 4 + 1/5R = 1, what is the first operation to undo?

• Add 4 to both sides

• Divide both sides by 5

• Multiply both sides by 5

• Subtract 4 from both sides

What is the value of R in the equation 4 + 1/5R = 1 after solving?

• 5

• 25

• -25

• -5

What is the reciprocal of 1/5 used in the equation 4 + 1/5R = 1?

• -5

• -1/5

• 5

• 1/5