Answer:
Step-by-step explanation:
1- Remove any grouping symbol such as brackets and parentheses by multiplying factors.
2- the exponent rule to remove grouping if the terms are containing exponents.
3- Combine the like terms by addition or subtraction.
4- Combine the constants.
Answer:
In the very first step, when they multiply both sides by 3 the -2y should become -6y but instead it stays as -2y. The correct solution would be:
9x - 6y =6
9x - 6y = 6
0 = 0
This means there are infinite solutions.
Answer:
25
Step-by-step explanation:
54-29=25
Answer:

Step-by-step explanation:
Given

Required
Number of books in 1 week
Represent the number of books in 1 week with x.
So, we have:

Cross Multiply


Convert fraction to improper fraction

Multiply through by 



<em>Hence: 12/7 books were read in a week</em>