Given 17 books.
Total 56 b<span>ooks.
How many books were in her collection before her teachers donation?
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First lets write an equation:
b = books before
17 + b = 56
Lets solve for b:
17 + b = 56
Inverse Operation:
56 - 17 = b
56 - 17 = 39
b = 39
Check:-
17 + b = 56
17 + 39 = ?
17 + 39 = 56
Correct!
There were 39 books in her collection before her teacher donated her books.
The equation is: 17 + b = 56.
b = 39
Answer:
The answer you get is x=-3, and y=5 or (-3,5)
Step-by-step explanation:
3x+y=-4 and 5x-2y = -25.
Firstly, to solve the equation let's use the multiplication method.
5x-2y=-25 (Multiply by 1)
3x+y=-4 (Multiply by 2)
=
5x-2y=-25
+6x+2y=-8
=
11x=-33
x=-3
We know that x=-3, now we can find y by substituting this value into other equations.
5(-3)-2y=-25
-15-2y=-25
+15 +15
-2y=-10
y=5
The answer you get is x=-3, and y=5 or (-3,5)
14.40%; 18/125= 0.144; 0.144×100= 14.40%
0.144×125= 18