Distinguishing between two types of equations.

Blessing buys 9 boxes of donuts for a class party. Evelyn brings an additional 6 donuts to the party to share. There are a total of 51 donuts for the party.

• 6x + 9 = 51

• 6(9 + x) = 51

• 9x + 6 = 51

• 9(6 + x) = 51

Tags

CCSS.HSA.CED.A.3

Tianna is listening to some music on a record for an unknown amount of time. She starts to keep track of the time and listens for an additional 7 minutes before the record is over. She spent a total of 35 minutes listening to the entire record.

• x + 7 = 35

• 7 (x + 5) = 35

• x - 7 = 35

• 5 ( x + 7) = 35

Tags

CCSS.HSA.CED.A.3

There are 5 gift bags that contain x pieces of candy. Macino adds 2 more pieces of candy to each bag. Altogether, the gift bags contain a total of 35 pieces of candy

• 5 (x + 2) = 35

• 5x + 2 = 35

• 2(x + 5) = 35

• 2x + 5 = 35

Tags

CCSS.HSA.CED.A.3

Riley bakes 3 equal pans of chocolate chip cookies. He adds another 5 cookies to each of his 3 pans and has a total of 45 chocolate chip cookies.

• 5(x + 3) = 45

• 3x + 5 = 45

• 3(x + 5) = 45

• 5x + 3 = 45

Tags

CCSS.HSA.CED.A.3

Elijah earns merits in five classes. Ms. Silva adds one merit to each of Elijahs five classes. Elijah earned a total of 15 merits for the day.

• 1x + 5 = 15

• 1 ( x + 5 ) = 15

• 5x + 1 = 15

• 5 ( x + 1) = 15

Tags

CCSS.HSA.CED.A.3

Phille drew a square with side lengths of 3 inches. She wants to increase the length of each side by x inches so the square has a total perimeter of 16 inches.

• 3x + 4 = 16

• 3( x + 4) = 16

• 4x + 3 = 16

• 4 ( x + 3 ) = 16

Jateja drew a triangle with side lengths of 7 inches. She wants to increase each side length by x inches. The triangle has a total perimeter of 27 inches.

• 3 ( x + 7) = 27

• 7x + 3 = 27

• 7 ( x + 3) = 27

• 3x + 7 = 27

Tags

CCSS.7.EE.B.4A

Attendance was taken before the bell in advisory. After the bell rang, 4 students came late and were marked off as present. There was a total of 27 kids present for the day.

• 2x + 4 + 27

• 2(x + 4) = 27

• x + 4 = 27

• 4x + 2 = 27

Tags

CCSS.HSA.CED.A.3