5 times marys age is the same as 28 less than 7 times her age. Find her age
2 answers:
Answer:
14yrs
Step-by-step explanation:
Mary’s age=x
5•x = x•7-28
=> 5x-7x= -28
=> -2x= -28
=> x= -28/-2
=> x= 14
setup a simple algebraic equation and solve.
5x = 7x-28
-5x -5x
0=2x-28
+28 +28
28=2x
Now divide both sides by 2 and you get that she is 14
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<h3>
Answer: 216 square feet</h3>
Work Shown:
Old area = 12*15 = 180 square feet
New area = 18*22 = 396 square feet
Difference = New - Old = 396 - 180 = 216
The patio's area increased by 216 square feet.
