Study Guide: Solving Equations

Simplify: 7t - 3t + t - 3t

• 2t

• 8t - 6t

• 14t

• Can't be simplified

Simplify: 4k + 6k - 3k + 3s - s

• 13k + 3s

• 7k + 2s

• 7k + 4s

• Can't be simplified

In algebra, what do we call the numbers that appear before the variables?

• Variables

• Constants

• Coefficients

• Exponents

What are the constants of this expression?
5y + 3x - 7 + 5y + 2

• 5y + 3x + 5y

• 3x + 5y - 5

• -7, 2

• 3x + 10y - 5

What is the solution for x + 9 = 21

• 10
• 12
• 11
• 13

x - 8 = -5 

• 13
• -13
• 3
• -3

Solve. 3x - 12 = 15

• 9

• -1

• 27

• -9

Solve:

-11+3(b+5) = 7

• b = -1

• b = 1

• b = -3

• b = 3

Solve the multi-step equation:

2(a + 4) = 20

Hint: you have to distribute and then solve.

• 0

• 6

• 12