are u guys smart?

Question

OK heres the question, Mary bought a blouse and a pair of jeans for a total of $38.50. The jeans cost $12.50 more than the blouse.

A.Write and equation to find out how much Mary paid for the jeans and the blouse.




B. Use your equation to solve for the variable. show all your work.


C. Substitute the value of your variable into your equation to show how much Mary paid for both the blouse and the jeans. Show or explain all your work.


These questions come from my Brothers math book and he is in 7th grade lets see how smart u people really are

Answer 1

x = blouse
y = jeans

x + y = 38.5
y = x + 12.5

Use substitution:

x + x + 12.5 = 38.5
2x = 26
x = 13

Blouse = $13.00
Jeans = $25.50

Answer 2

let x = the cost of the blouse

let x + 12.50 = the cost of the jeans

so the formula looks like this: x + x + 12.50 = 38.50

combine like terms x + x = 2x

so: 2x + 12.50 = 38.50
- 12.50= -12.50
------------------------------------
2x = 26
/2=/2
------
x = 13

therefore the blouse is $13 and the Jeans are $25.50

13 + 13 + 12.50 = 38.50

Answer 3

blouse = x
jeans = y

y = 12.50 + x

x + y = 38.50

x + x + 12.50 = 38.50
2x + 12.50 = 38.50
2x + 12.50 - 12.50 = 38.50 - 12.50
2x = 26
(2x)/2 = 26/2
x = 13 = blouse
y = 13 + 12.50
y = 25.50 = jeans

13 + 25.50 = 38.50
38.50 = 38.50
2(13) + 12.50 = 38.50
26 + 12.50 = 38.50
38.50 = 38.50

Answer 4

let the blouse cost $ x..then the jean will cost x+12.5
--> x+ x+12.5 = 38.50
--> 2*x = 26.0
--> x = $ 13

So, the blouse costs $ 13 and the jeans costs $ 25.5

Answer 5

a + (a+12.50) = 38.50
2a+12.50=38.50
2a=38.50-12.50
2a=26.00
a=13
13 blouse+25.50jeans=38.50

man I stink writing it out - I do it all in my head *eyeroll*

Answer 6

If Mary would have waited until after Christmas she could have save 50%.

Answer 7

Just trust me I am smart!