Question

Brianna solved a two-step equation, but she made a mistake along the way.

0.1x + 3 = 1.7
(-3) + 0.1x + 3 = 1.7 + (-3) Line 1
0.1x = -1.3 Line 2
(-0.1) + 0.1x = -1.3 + (-0.1) Line 3
x = -1.4 Line 4
What mistake did Brianna make?
On Line 1, Brianna should have subtracted 3 instead of adding -3.
On Line 1, Brianna violated the addition property of equality.
On Line 3, Brianna should have divided by 0.1 instead of subtracting 0.1.
On Line 3, Brianna violated the addition property of equality.

Answer 1

The mistake that Brianna made in the equation is C. On Line 3, Brianna should have divided by 0.1 instead of subtracting 0.1.

How to illustrate the information?

It should be noted that an equation simply shows the relationship that exist between the variables.

The equation given is:

0.1x + 3 = 1.7

0.1x = 1.7 - 3

0.1x = -1.3

The next her should be to divide by 0.1. This was the mistake.

Therefore, on Line 3, Brianna should have divided by 0.1 instead of subtracting 0.1.

Learn more about equations on:

brainly.com/question/2972832

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