7x = 3x-8
solution
7x-3x = - 8 shift, sign change
4X = - 8 merge
X = - 8 / 4 solution x
x=-2
RELATED INFORMATIONS
- 1. The number of six digits is () A. 40B. 60C. 80D. 10
- 2. If M and N are the square roots of the same number and m ≠ n, what is the value of 3M + 3N?
- 3. If the two equations X & # 178; + (a + 1) x + A & # 178; = 0 are reciprocal to each other, a =?
- 4. 3x + 6x-4 = 0
- 5. How many three digits can be made up of 123456? How many three digits can be divided by 5 without repetition? twenty
- 6. The origin of the concept of square root is related to the square in geometry. If the area of a square is s, then the side length of the square is s______ .
- 7. Given two reciprocal numbers of the equation x & # 178; - 3x-a + 1, find the value of a and its two
- 8. What is 3x × 6x? 3x times 6x
- 9. How many three digit numbers can be made up of 1, 2, 3, 4, 5 and 6, which have no repetition and whose individual digit is 5?
- 10. The origin of the concept of square root is related to the square in geometry. If the area of a square is a, what is the side length of the square The origin of the concept of square root is related to the square in geometry. If the area of a square is a, what is the side length of the square?
- 11. It is known that the equation M & # 178; X & # 178; + (2m + 3) x + 1 = 0 about X has two reciprocal roots, so we can find the value of real number M
- 12. There is a passage in the eighth grade mathematics textbook: the square root of the positive number a can be represented by √ a, and the negative square root of the positive number a can be represented by - √ a There is a note beside it saying that the symbol √ A is meaningful only when a ≥ 0, but not when a is less than zero. Why
- 13. The number of six digits is () A. 40B. 60C. 80D. 10
- 14. How to solve 8 + 0.7x = 18-3.3x equation
- 15. We know the equation x2 + (M + 2) x + 2m-1 = 0 about X. (1) prove that the equation has two unequal real roots. (2) when m is the value, the two roots of the equation are opposite to each other? The solution of the equation is obtained
- 16. Given that a is the integral part of √ 170 and B-1 is the square root of 400, find √ a + B
- 17. The number of six digits is () A. 40B. 60C. 80D. 10
- 18. (3x + 5) (- 3x + 5) - x (7x + 8) (7x-8) - (8x) where x = - 2
- 19. If two of the equations X & # 178; + (M & # 178; - 1) x + M = 0 are opposite to each other, then the value of M is
- 20. Square root of 0,3, square root of 6, square root of 3,12, square root of 15, square root of 18, find the law What's the tenth number?