Noam solved the equation for k using the following calculations.

k - 7.6 = 10.35
+ 7.6 + 7.6

k=17.41

what error, if any, did he make?

1. he should have subtracted 7.6 instead of adding it.
2. he should have subtracted 10.35 from both sides.
3. he made a computation error when he added 10.35 + 7.6
4. he made a computation error when he added -7.6 and 7.6

3) He made a computation error when he added 10.35+7.6

Step-by-step explanation:

Steps to add decimals:

1)Write down the numbers, one under the other, with the decimal points lined up

2) Put in zeros so the numbers have the same length

3) Then add using column addition, remembering to put the decimal point in the answer

Applying the above steps:

line the decimals up             10.35

                                                7.6

Putting zero to get same length

                                              10.35

                                                7.60

Addition:

                                               10.35

                                               +7.60

                                               17.95

Now we can see that, there is error when he added 10.35 + 7.6

He made a computation error when he added 10.35+7.6

Step-by-step explanation:

simplifying

5(x + -6) = 2(x + 3)

reorder the terms:

5(-6 + x) = 2(x + 3)

(-6 * 5 + x * 5) = 2(x + 3)

(-30 + 5x) = 2(x + 3)

reorder the terms:

-30 + 5x = 2(3 + x)

-30 + 5x = (3 * 2 + x * 2)

-30 + 5x = (6 + 2x)

solving

-30 + 5x = 6 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-30 + 5x + -2x = 6 + 2x + -2x

combine like terms: 5x + -2x = 3x

-30 + 3x = 6 + 2x + -2x

combine like terms: 2x + -2x = 0

-30 + 3x = 6 + 0

-30 + 3x = 6

add '30' to each side of the equation.

-30 + 30 + 3x = 6 + 30

combine like terms: -30 + 30 = 0

0 + 3x = 6 + 30

3x = 6 + 30

combine like terms: 6 + 30 = 36

3x = 36

divide each side by '3'.

x = 12

simplifying

x = 12

this should .