If 2x + 3Y = 4, try to find the value of the power X of the algebraic formula 4 and the power y of the algebraic formula 8
Value substitution
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- 1. When x = 1 and x = - 4, the value of the algebraic formula ax ^ 2 + BX + C is 8. When x = - 1, the value of the algebraic formula ax ^ 2 + BX + C is 2. Find the value of a, B and C
- 2. If x = 1, the value of the algebraic formula ax ^ 2 + BX + 1 is 5. When x = - 1, the value of the algebraic formula ax ^ 3 + BX + 1 is obtained The first is ax ^ 2, the second is ax ^ 3
- 3. 0.7/x-0.03 / (0.17-0.2x) = 1 (find x,)
- 4. The denominator in the equation x0.7 − 0.17 − 0.2x0.03 = 1 is changed into an integer, and the correct one is () A. x7−17−2x3=1B. 10x7−17−2x3=1C. 10x7−17−20x3=10D. 10x7−17−20x3=1
- 5. It is known that a and B are fixed values. No matter what the value of K is, the solution of the linear equation (3kx + A / 3) - (x-6k / 6) = 2 with respect to X is always x = 1 Try to find the value of a and B The equation is [(3kx + a) / 3] - [(x-bk) / 6] = 2
- 6. If a and B are fixed values, 2kx + A / 3 - x-6k / 6 = 2, no matter what the value of K is, his solution is always 1, and the value of a and B is obtained
- 7. If a and B are fixed values, the solution of the linear equation of one variable (2kA / 3) - (x-bx / 6) = 2, no matter what the value of K is X = 1, find the value of a and B I saw that other people didn't explain why ∵ K is any value ∴4a=0 13-b=0?
- 8. If a and B are fixed values, the solution of the equation (3kx + a) / 3 - (x-bx) / 6 = 2 is always 1 no matter what the value of K is
- 9. If a and B are fixed values, the solution of the linear equation 2kA + x3-x-bx6 = 2 is always 1 no matter what the value of K is
- 10. How to solve the linear equation of one variable with fractional denominator For example: 0.3x/0.4-0.5x/0.6 = 8 I've given a blind example, which is mainly "=" do you want to multiply the right side by the same value as the left side?
- 11. Given that the value of the second power + 5x + C of the algebraic formula 2x when x = 1 is 10, find the value of the algebraic formula when x = - 2
- 12. If the algebraic expressions 3 (x-1) and (X-2) are opposite to each other, then x=
- 13. Given the equation 2x + y = 3, if y is expressed by an algebraic expression containing x, then y=______ .
- 14. The equation x = 2m-1, y = 4-m, using the algebraic expression containing x to express y, then y=__________
- 15. Given that x = 3 ^ (2m-1), y = 3 + 9 ^ m, please use the algebraic expression containing x to express y
- 16. It is known that equation 3 (x-4) + 2 (y + 1) = 5. (1). Express y with the algebraic expression of X. (2) express x with the algebraic expression of Y
- 17. If x = y + 3, then the value of algebraic formula 1 / 2 * (X-Y) + (Y-X) ^ 5 is
- 18. Let y in the quadratic equation 3x + 2Y = 6 be expressed as___ .
- 19. Given that 3x + 2y-6 = 0, how much y = is obtained by using the algebraic expression y containing x
- 20. Given 2x + 3Y = 5, if y is expressed by an algebraic expression containing x, then y=______ .