Answer:
and
the mistake was in calculating
let's solve first.
Step-by-step explanation:
if
, substitute the
in the equation
as

solve the equation in parentheses :
multiply
by
it will equal to: 
now we want to let all unknown digits alone, so we will take
to the other side with a different sign it will be as:

now we will solve it:
at this part, the given equation was wrong in the paper.
we don't want the digit to be negative so we will do it like this:

now that we found
we will substitute it to find
:

overall the mistake was in calculating
instead of putting
he/she put a different sign in front of the digit like :
so when he/she flipped
it became positive and instead of subtracting he/she added it.
Step-by-step explanation:
-1/ 4 , -2/4 , 0.20 , 0.90 ,3/4 ,1.50 - 0.50 ,7/4
because if you changed them whole to decimal it shows the result
-1/4 = - 0.25
-2 / 4 = - 0.5
3 / 4 = 0.75
1.50 - 0.50 = 1
7/4= 1.75
0.20 and 0.90 are already decimal numbers
The equation when rewritten is 
<h3>Calculations and Parameters:</h3>
When we consider the vertex form of the equation:
y= 3(x-2)^2 - (x-5)^2
Expanding further:
2((x-0.5)^2 - 27/4) = 2( (x-0.5)^2)- 27/2
Thus, the final form of the equation would be 
Read more about equations here:
brainly.com/question/17109781
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Answer:
use symblaob
Step-by-step explanation:
on g_o_o_g_l_e
Well if you're wanting to use substitution, you first have to end up with one term on either side of the equation. Use the second one as it's easiest.
So: x-2y=11, so find -2y as there is a -2y in the first equation.
then that becomes -2y=11-x. then sub that into equation 1, and you get:
-x+11-x=-13, which equals to -2x+11=-13, which is -2x=-24, so therefore
x=12. then chuck the x into any of the equations to find what y equals.
hope this helps!