3A + 2B + C = 5,2a + b-3c = 1,3a + b-7c = m, a, B and C are expressed by algebraic expressions containing m respectively
A = 7c-3, B = 7-11c are obtained from the first two formulas, and C = [M + 2] / 3 is obtained by substituting the third formula
therefore
a=〔7m+5〕/3
b=-〔11m+1〕/3
c=〔m+2〕/3
RELATED INFORMATIONS
- 1. It is known that a, B and C are all integers. When the value of the algebraic formula 7a + 2B + 3C can be divisible by 13, can the value of the algebraic formula 5A + 7b-22c be divisible by 13? Why?
- 2. 70 square decimeters equals () square meters fill in the simplest score
- 3. How many square meters is 30 square decimeters? How many hours is 24 minutes? How many kilograms is 750 meters? How many kilograms is 450 grams
- 4. How many square meters is 140 square decimeters equal to
- 5. Inequality 4x-5
- 6. Let the solution set of inequality f (x) ≥ 0 be [1,2], and the solution set of inequality g (x) ≥ 0 be an empty set Let the solution set of inequality f (x) ≥ 0 be [1,2], and the solution set of inequality g (x) ≥ 0 be an empty set, then if the solution set of inequality f (x) / g (x) > 0 is complete, there is another answer
- 7. Given that f (x) = a ^ x, G (x) = a ^ (x ^ 2-x-3) (a > 0, a ≠ 1), try to find the solution set of the inequality f (x) ≤ g (x)
- 8. If the solution set of the inequality f (x) ≥ 0 is [2,4], and the solution set of the inequality g (x) ≥ 0 is ±, then the solution set of the inequality f (x) g (x) > 0 is______ .
- 9. If f (x) = 2 Λ x, G (x) = 4 Λ x, then the solution set of the inequality f (g (x)) < g (f (x))?
- 10. Solving inequality g (x) ≥ f (x) - / X-1/
- 11. The first formula of quaternion equation is a: B: C: D = 2:3:4:5, and the second formula is a + 2B + 3C + 4D = 1 How much is ABCD?
- 12. Suppose that a, B, C and D are four constants. Here are four equations: (a-2b) x = 1, (b-3c) y = 1, (c-4d) z = 1, W + 100 = D, What are the minimum values of X, y, Z and W respectively
- 13. 5. If a, B, C, D are all integers, and the equation (a-2b) x = 1, (b-3c) y = 1, (c-4d) z = 1, W + 100 = D has positive integer solutions x, y, Z, w respectively, then the minimum value of a is___
- 14. If ABCD is a four digit number and ABCD + A + 2B + 3C + 4D = 2011, what is ABCD?
- 15. A < 2B B < 3C C < 4D d < 50A the maximum value is? A1157 b1167 c1191 d1169
- 16. A + B + C = 0 and the distance between B and - 1 is equal to the distance between C and - 1, find the square of a + 2b-c - (a-4c-b)
- 17. If a > b > 0 > C, a + B + C = 0, and | B + 1 | = | C + 1 |, find the value of - a square + 2b-c - (a-4c-b) |B + 1 | = | C + 1 |, B + 1 = - C-1, B + C = - 2 If a + B + C = 0, then a = 2 So: -Square a + 2b-c - (a-4c-b) =-a^2+2b-c-a+4c+b =-a^2-a+3(b+c) =-4-2-6 =-12
- 18. Given the root 6a-12 + (2B + 2) square + / 6-4c / = 0, find the value of 2abc
- 19. In the triangle ABC, BC = 2Ab, ∠ ABC = 2 ∠ C, BD = CD Point D is on BC
- 20. In the triangle ABC, BC = 2Ab, ∠ ABC = 2 ∠ C, BD = CD