3.
circle the step where the error has occurred. explain why it is an error.
given
step 1: distribute
step 2: combine like terms
step 3: subtraction property of equality
step 4: addition property of equality
step 5: division property of equality
2(10 - 13x) + 9x = -34x + 60
20- 26x + 9x = -34x + 60
20 - 17x = -34x + 60
-17x = -34x + 40
-51x = 40
x = -51/40
i don't understand this question

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

Step 1. Distribute

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

Step 2: Combine like Terms

20-17x=-34x+60  (-26x+9x = -17x)

Step 3: subtraction property of equality

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

-17x+34x=40

Step 4 :Addition property of Equality

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

17x=40

Step 5: Division property of Equality

17x=40

17x/17 = 40/17

x=40/17

Answer

x=40/17

Errors

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

a = 11 : 4

b = 38

c = 1 for every 6