Q: C plus -2 equals 21

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To find this: You know (B+C) = 7. Therefore you know (A+A )= 21 - (B+C). Therefore 21-7 = 14. So now you know (A+A) = 14. So you divide (A+A)/2. This equals 7. Therefore A = 7.

c+c+c=6 C=2 Because: 2+2+2=6

7.5

a + c - b = 3 + 2 - 5 = 5 - 5 = 0

2 PbO + C -> 2 Pb + CO2

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To find this: You know (B+C) = 7. Therefore you know (A+A )= 21 - (B+C). Therefore 21-7 = 14. So now you know (A+A) = 14. So you divide (A+A)/2. This equals 7. Therefore A = 7.

The answer is 21 because if 21 is divided by 3 it equals 7 plus 4 equals 11.

If: 3c = 6Then: c = 2

c+c+c=6 C=2 Because: 2+2+2=6

the answer is a

7.5

a + c - b = 3 + 2 - 5 = 5 - 5 = 0

2 PbO + C -> 2 Pb + CO2

The Pythagoream Thereom is a^2 + b^2 = c^2. Written out it is a squared plus b squared equals c squared.

144 Formula: c= (a2)+(ab)

b = sqrt32 or 4 root 2

If 2b a plus c, then we can say that 3tan A 2tan c = 21.