Writing Equations

The sisters ages together are y years. One sister is 8 years old and the other is x years old. Write an equation to expressing this relationship.

• y = 8x

• y = x + 8

• x = 8y

• x = 8 + y

Tags

CCSS.6.EE.C.9

For every A, Diane gets on her homework, her parents give her $3. Which equation matches this scenario? Use m for money she makes, and A for the number of A's she gets on her homework.

• m= 3 + A
• m= 3A
• m= A + 3
• none of the these

Tags

CCSS.6.EE.C.9

Use the equation   m = 8 + d for find how old Mary (m) is if David (d) is 10 years old.

• 80 years old
• 1 year old
• 15 years old
• 18 years old

Tags

CCSS.HSF.IF.A.2

A number five times is twenty five.

• 3x = 25

• 4x = 25

• 5x = 25

• 6x = 24

Tags

CCSS.6.EE.B.7

The sum of x and ten is twenty.

• x - 10 = 20

• x + 10 = 20

• x + 10 = 25

• 10x = 20

Tags

CCSS.6.EE.B.7

A number minus 9 is twelve.

• x - 9 = 12

• 9 - x = 12

• x - 9 = 13

• 9 - x = 14

Tags

CCSS.6.EE.B.7

Five less than a number n is thirty four.

• 5 - n = 36

• n - 5 = 35

• 5 - n = 34

• n - 5 = 34

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.7

Two less than a number is fourteen.

• x - 2 = 14

• 2 - x = 14

• x - 2 = 15

• 2 - x = 13

The sum of 6 and a number is 5 less than forty.

• 6 + x = 5 - 40

• 6x = 40 - 5

• 6 + x = 40 - 5

• 6 + x = 45

Tags

CCSS.HSA.CED.A.3

5 more than a number is sixty

• x + 5 = 50

• x + 5 = 60

• 5 + x = 60

• 5 + x = 50

Tags

CCSS.6.EE.B.7