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kvv77 [185]
3 years ago
7

3.

Mathematics
2 answers:
kari74 [83]3 years ago
6 0

Answer:

The step 4 and step 5 both are wrong.

Step-by-step explanation:

Consider the provided steps:

Given: 2(10-13x)+9x=-34x+60

Step 1: Distribute

20-26x+9x=-34x+60

Step 2: Combine like terms

20-17x=-34x+60

Step 3: Subtraction property of equality

20-20-17x=-34x+60-20

-17x=-34x+40

Step 4: Addition property of equality

-17x+34x=-34x+34x+40

17x=40

Step 5: Division property

x=\frac{40}{17}

From the above calculation we can concluded that the step 4 and step 5 both are wrong.

Step 4 should be 17x=40

Step 5 should be x=\frac{40}{17}

rodikova [14]3 years ago
4 0

Answer:

Step 3.

Operation error, where the sign on the number changes from -ve to +ve where shifted to the left side of the equation.

Step-by-step explanation:

Given that  2(10 - 13x) + 9x = -34x + 60

<u>Step 1. Distribute</u>

20-26x+9x=-34x+60

<u>Step 2: Combine like Terms</u>

20-17x=-34x+60  -------------------------(-26x+9x = -17x)

<u>Step 3: subtraction property of equality</u>

-17x+34x=60-20--------------------- (60-20 =40)

-17x+34x=40

<u>Step 4 :Addition property of Equality</u>

-17x+34x=40-------------------(-17x+34x =17x)

17x=40

<u>Step 5: Division property of Equality</u>

17x=40

17x/17 = 40/17

x=40/17

Answer

x=40/17

<u>Errors</u>

In step 3

-17x+34x = 17 x and not 51x

In step 5

-51x=40

x=-40/51 (not the other way round, -51/40) however correct operation is supposed to be;

17x=40, hence x =40/17

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