Multi-Step Equations Error Analysis

Front

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

Back

Instead of adding 3k they should subtract 3k

Front

Find the error in the student's solution: 1/5x + 6 = 3/5x + 5
1x + 6 = 3x + 5
-2x + 6 = 5
-2x = -1
x = 1/2

Back

The student did not multiply all terms by the common denominator

Front

How many solutions does the equation 5 + 2(n + 1) = 2n have?

Back

No Solution

Front

How many solutions does the equation below have?
5h - 7 = 5(h - 2) + 3

Back

Identity

Front

How many solutions does the equation 6(3a +1) - 30 = 3(2a - 4) have?

Back

One Solution

Front

Is the solution below correct?
5d = 2d - 18
-2d   -2d
3d = -18
d = 6

Back

No

Front

Is the solution below correct?
-6z + 13 = 7z
+6z           +6z
13 = 13z
z = 1

Back

Yes

Front

A hang glider, 25 meters above the ground, starts to descend at a constant rate of 2 meters per second. Which equation shows the height h after t seconds?

Back

h = -2t + 25

Front

Cost to paint two rectangular walls each 12 feet by 23 feet at $0.08 per square foot.

Back

$44.16

Front

Solve
6.78x - 5.2 = 4.33x + 2.15

Back

3