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Sagot :
Answer:
4
Step-by-step explanation:
Let the heart be A
Let the rainbow be B
Let the horn be C
We can set up the following system of equations:
A + B + B = 35 which just equals A + 2B = 35
A + C + B = 37
B + C + C = 25 which just equals B + 2C = 25
We can look at the third equation and solve for B
B + 2C = 25
B = 25 - 2C
Then, look at the first equation
A + 2B = 35
A = 35 - 2B
We now know the values of A and B, therefore, we can plug it into the second equation to find the value of C
A + C + B = 37
(35 - 2B) + C + (25 - 2C) = 37
[35 - 2(25 - 2C)] + C + (25 - C) = 37
Solving for C gives us:
C = 9
We can plug-in C's value into B's equation:
B = 25 - 2C
B = 25 - 2(9)
B = 25 - 18 = 7
We can plug-in B's value into A's equation:
A = 35 - 2B
A = 35 - 2(7)
A = 35 - 14 = 21
Now we know all of the values and look at the fourth equation:
C + C + B - A
= 9 + 9 + 7 - 21
= 4
Answer:
? = 4
Step-by-step explanation:
1H + 2R = 35 >> H = 35 - 2R
1H + 1C + 1R = 37
35 - 2R + C + R = 37
C - R = 2
2C + R = 25
_________
3C = 27
C = 9
9 - R = 2
-R = -7
R = 7
H = 35 - 2(7) = 35 - 14 = H = 21
2C + R + H = ?
2(9) + 7 - 21
25 - 21 = 4
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