Answer:
Set up a proportion ,
80/x 9/100
9 is over 100 because it is a percent and 100% is the highest %.
doing a proportion you cross multiply getting you..
9x =80 x 100
9x= 800
divide by 9 on both sides
that determines your answer
you try !
Step-by-step explanation:
Since bot of the expressions in x are equal to y we can equate them as follows:-
6x + 9 = 7x + 7
9 - 7 = 7x - 6x
x = 2
and y = 6(2) + 9 = 21
THe answer is Choice B
{4x + 4y = 20 | ÷4<span>
{2x -2y = -18 | </span>÷2
{x + y = 5
{x -y = -9
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2x = -4
x = -2
x + y = 5
-2 + y = 5
y = 5 + 2
y = 7
The answer is (-2, 7)
To solve for x, you simplify both sides of the equation and then isolate the variable.
<em>10x + 12 = $72.00</em>
<em>x = 6</em>
Six people attended the concert.
<em>Check the answer:
(10 • 6) + 12 = 72.00
60 + 12 = 72.00
_____________________________________________________________
<u>Answer: x = 6</u></em>
