Lesson 02: Truth and Equations | Unit 6: Expressions and Equations

Multiple Select

Select **all** the true equations.

• 5 + 0 = 0

• $$15\cdot0=0$$

• $$1.4+2.7=4.1$$

• $$\frac{2}{3}\cdot\frac{5}{9}=\frac{7}{12}$$

• $$4\frac{2}{3}=5-\frac{1}{3}$$

Multiple Select

Select **all** the equations that are true when the value of the variable is 4.

• $$9\cdot x=32$$

• $$31-x=17$$

• $$1=\frac{1}{4}x$$

• $$x+18=22$$

• $$10x=14$$

Multiple Choice

Which equation shows that $$\frac{1}{5}$$ is a solution to the equation $$30x=6$$ ?

• $$30 + \frac{1}{5} = 30\frac{1}{5}$$

• $$30 \cdot \frac{1}{5} = 6$$

• $$30 \div \frac{1}{5} = 6$$

• $$30 \div 6 = \frac{1}{5}$$

Multiple Choice

For the equation $$2n = 7$$ : What is the variable?

• n
• 2n
• 7
• n = 2

Multiple Choice

For the equation $$2n = 7$$ : What is the coefficient of the variable?

• 3
• 5
• 10
• 2

Multiple Choice

For the equation $$2n = 7$$ : Which of these is the solution to the equation?

• $$\frac{2}{7}$$

• $$\frac{7}{2}$$

• 5

• 9

Multiple Choice

Which of these is a solution to the equation $$\frac{2}{5}=\frac{1}{8} + x$$ ?

• $$\frac{2}{40}$$

• $$\frac{5}{16}$$

• $$\frac{11}{40}$$

• $$\frac{17}{40}$$