Answer:
A. 44+4x
B. The error is that Ben forgot to distribute his terms by multiplying 7 by 15 so instead of 30x+7 he should have gotten 30x+105
C. (44+4x)-(12x+20) to solve for difference in perimeter
Step-by-step explanation:
Students can combine like terms on the left side of the equation, resulting in 12x−3=6(x−3).
Given the equation solved by a student
10x−3+2x=6(x−3)
- The first step that the student could use to solve the expression correctly is to expand the bracket on the right-hand side of the equation using the distributive law as shown:

- The student can also combine like terms on the left side of the equation, to give;

Hence the correct option will be students can combine like terms on the left side of the equation, resulting in 12x−3=6(x−3).
learn more here: brainly.com/question/11847518
In both cases, the equation can be rewritten to be
30 = 6x
The value of x is 5.
Answer:
48/3.2=15
30
15
3
Got 3.2 from Second length is twice the third so we divide by 2 + 1 = 3
0.2 is from 1/5 = 0.2
3 is the third length
30 is second length and 15 is the first.
Step-by-step explanation: