Question

Mona solved an equation incorrectly, as shown below:

Step 1: 5x = 30
Step 2: x = 30 − 5
Step 3: x = 25

Which statement best explains why Step 2 is incorrect in Mona's solution?

She did not add 5 to 30.

She did not divide 30 by 5.

She did not multiply 30 by 5.

She did not multiply 30 five times.

Answer 1

This is wrong because to get the answer you need to divide both sides by 5

Answer 2

She did not divide 30 by 5.
One has to divide each side of the equation by 5 to get rid of the 5 in front of the x term.

Answer 3

so B? @Photon336

Answer 4

Yes.

Answer 5

Thanks

Answer 6

Thank you for the medal.

Answer 7

An equation is shown below:

4(2x − 3) = 1

Which of the following correctly shows the first two steps to solve this equation?

Step 1: 6x − 7 = 1; Step 2: 6x = 8

Step 1: 6x + 1 = 1; Step 2: 6x = 0

Step 1: 8x − 12 = 1; Step 2: 8x = 13

Step 1: 8x − 3 = 1; Step 2: 8x = 4

Answer 8

@robtobey

Answer 9

Step 1: 8x − 12 = 1; Step 2: 8x = 13
The idea is to move all of the integers to the RHS and then divide each side
of the equation by the coefficient of x in order to solve for x.