Writing Equations with Variables

7 times a number a is 42.

• 7a = 42

• 7 + a = 42

• 7/a = 42

• 7 - a = 42

5 more than a number m is the same as 8

• m - 5 = 8

• m + 5 = 8

• 5m = 8

• m/5 = 8

Solve for x

x + 4 = 10

• 2

• 6

• 10

• 11

The sum of a number k and 5 is 11.

• 5k = 11

• 5 - k =11

• 5/k = 11

• 5 + k = 11

Solve for n.

3n - 2 = 45

• 47/3

• 17

• 16

• 15

Solve for g.

2g + 3 = 35

Write an equation for: "Five less than a number is twenty."

• x - 5 = 20

• 5 - x = 20

• x + 5 = 20

• 20 - x = 5

At Gamestop you can buy a Xbox One for $150.00 and each game to go with it would cost $24.00. Or, you can buy a Playstation 4 for $180.00 and each game for $20.00. Write an equation to determine how many games would need to be purchased for the cost to be equal?

• 150x + 24 = 180 + 20x

• 150 + 24x = 180 + 20x

• 180 - 150 = 24 x + 20x

• 150 - 24x = 180 - 20x

Write an equation to show the height of the tomato plant.

Mathematical Equivalence

ON

Answer explanation

Tags

CCSS.MATH.CONTENT.HSA.CED.A.2

CCSS.MATH.CONTENT.HSS.ID.C.7

Write an equation in y=mx+b form.

Mathematical Equivalence

ON