Add and Subtraction equation with one variable

Solve the equation below:

2.8 = b + 2.3

• b = 0.3

• b = 5.1

• b = 0.5

• b = 5

Solve the equation below:

1.8 = n - 1.3

• n = 3.1

• n = 0.5

• n = 31

• n = 2.1

y-3=12

• y = 15

• y = 9

• y = 10

• y = 16

Sara and Jamie are debating about how the equation below should be solved.

b - 20= 44

Sara says you should add 20 to 44; but Jamie disagrees and states that you should subtract 20 from 44. Who is correct

• Both students are correct

• Sara is correct because she is using the inverse operation

• Jamie is correct because the equation has a - 20

• either are correct

All of the following are equations except for

• x + 5 = 20

• 5x - 1

• y + 5 = 10

• 5/x - 5 = 25

True or false equations have equal signs

• True

• False

Devon needs to solve for the value of k in the equation k + 11 = 20. Which of these steps would BEST help Devon solve the equation?

• add 11 to the 20

• subtract 11 from + 11

• Subtract 11 from both sides of the equation

• Add 20 to both sides of the equation

An equation is a mathematical sentence that uses an equal sign (=) to show that two expressions are equal.

Is this true or false

• true

• False

y + 5 = 23

When y = 20 are both sides equal

• yes

• no

y + 7 = 21

What is the value of y?

• y = -7

• y = 28

• y = 14

• y = 21