Error Analysis Describe and correct the error student made when solving. kx + 3x = 4 for x. kx + 3x = 4 kx + 3x - 3x = 4 - 3x kx=4 - 3x - 3x x = 43 X

Question

asked Feb 17, 2020 235k views

1 Answer

GSerjo · Answer 1 · 2020-02-21T18:51:05+0000

Answer:

Solving
kx+3x=4

for x

x=(4)/(k+3)

Explanation:

kx+3x=4

kx+3x-3x=4-3x here the student leave 'x' in both sides

The error is not notice the factor is the 'x'

So:

kx+3x=4

$x(k+3)=4\\x=(4)/(k+3)$

Is the best way to solving to 'x' 'k' maybe is knowing o is a constant