Linear Equations and Word Problems

Which equation would describe "two times a number plus five equals 15"?

• x + 5 = 15

• 2x + 5=15

• x + 2(5) = 15

• 2(x + 5) = 15

What step would you take to solve this equation?

• Multiply both sides of the equation by 2

• Divide both sides of the equation by 2

• Add 2 to both sides of the equation

• Subtract 2 from both sides of the equation

For a field trip 4 students rode in cars and the rest filled nine buses. How many students were in each bus if 472 students were on the trip?

• 4x=472

• 9x=472

• 4+9x=472

• 4+x=472

After paying $5.12 for a salad, Kamauri has $27.10. How much money did he have before buying the salad?

• n + $5.12 = $27.10

• n - $5.12 = $27.10

• n - $5.12 = -$27.10

• $5.12 - n = $27.10

What is the first step in solving this equation:
5x + 7 = 12

• Divide by 5

• Subtract 5

• Multiply by 7

• Subtract 7

2x + 1 = 6

What would the first step be in solving this equation?

• Divide by 2

• Subtract 1

• Subtract 6

• Times 2

Solve for x:
6(2x + 1) = 18

• 3

• 17/12

• 1

• 2

Solve for x:
7 - 5x = 12

• 1

• -6

• -1

• 6

Solve:
-4x = 24

• 20

• -20

• 6

• -6

Solve:
3(x - 2) = 18

• 6.7

• 4

• 8

• -4