Review Solving Linear Equations

Error Analysis

A student solved the equation incorrectly.

Mark which step the student made an error

Find the solution for the equation shown.

When typing your answer only type the number with no spaces.

Mathematical Equivalence

OFF

Solve the equation for n:

-(n - 8) = -2

• n = 6

• n = 10

• n = -10

• n = -6

Find the solution to the equation: 10 − 3(m − 5) = 2(5 − m) Type your answer as just a number with no spaces or variable

Mathematical Equivalence

ON

Answer explanation

Nsolve

Which is the correct equation to solve the problem?

• 3x+13=-3+5x

• 3x+13+19.3=-3+5x

• (3x+13)(-3+5x)=19.3

• 3x+13+-3+5x=19.3

Find the error in the problem below
19 - 2k = 3k - 1
     +3k   +3k
19 + 1k = -1
-19           -19
k = -20

• They should have divided by 1 for the last step

• They should add 19 instead of subtracting 19

• I can not find an error

• Instead of adding 3k they should subtract 3k

Describe the solution set:
2(x + 5) = 2x + 5

• one solution

• no solution

• infinitely many solutions

• two solutions

Which of the equations has no solution?

• 2x + 1 = 5x - 3

• 2(x - 7) = 2x-14

• 3(2x+1) = 6x+1

• 15x - 30 = 0

Which of the equations has infinitely many solutions?

• 2x + 1 = 5x - 3

• 2(x - 7) = 2x-14

• 3(2x+1) = 6x+1

• 15x - 30 = 0