6-6a=3a-3b+1, 9a-3b=5
<span>4b - 8 =3a, 3a-4b=-8
</span>
9a-3b=5
(3a-4b=-8 )*(-3 )
9a -3b= 5
-9a+12b=+24
adding both equations
9b=29, b=29/9
3a=4b-8=4*29/9 -8=(4*29-8*9)/9 = 44/9
a=44/27
a-b=44/27 - 29/9=44/27 - 29*3/27=-43/27
this is a correct answer, unfortunately they do not have this choice, probably they made mistake somewhere. I even check the solution of equations by substitution values of a and b into equations
Answer:
44,51
Step-by-step explanation:
It is cut off, but according to the Order of Operations [GEMS(A)\BOMDAS\PEMDAS etc.], parentheses are dealt with first:
(13,1 × 3) + 5,21 = 44,51
39,3
Just like whole numbers, you multiply the exact same way.
I am joyous to assist you anytime.
The equivalent expression of 
is 
<h3>How to determine the
equivalent expression?</h3>
The complete question is in the attached image
The expression is given as:
Subtract 11 from both sides of the equation
This gives
Hence, the equivalent expression of is
Read more about equivalent expression at:
brainly.com/question/4344214
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Step-by-step explanation:
Variable x = total number of students enrolled
495 people at the dance - 7 teachers = 488 students
4/5 = 488/x
Step 1: cross multiply
4x = 2440
Step 2: isolate the variable (x) by dividing by 4
x = 2440 ÷ 4
Step 3: solve
x= 610 students total
