4 / x = 5 / 80 7.2:12 + 9 / 1: x 2.5 + 6 / 15.6:2.88 + 2.6: X solution ratio
4 of x = 5 of 80 7.2:12 = 9 of 1: x 2.5 of 1.5 = x of 6 15.6:2.88 = 2.6: X
5x = 4 * 80 7.2x = 1 / 12 * 9 1.5x = 2.5 * 6 15.6x = 2.88 * 2.6
5x = 320 7.2x = 4 / 3 1.5x = 15 15.6x = 7.488
X = 64 x = 5 / 27 x = 10 x = 0.48
RELATED INFORMATIONS
- 1. 6.5: x = 0.5:4 X: 0.42 = 7:21 1 / 8:1 / 6 = 1 / 10: x 6 / 2.5 = x / 3 3 / 2:1 / 3 = x: 8 x: 9 / 2 = 1 / 3:2 (solution ratio) 6.5: x = 0.5:4 X: 0.42 = 7:21 1 / 8:1 / 6 = 1 / 10: x 6 / 2.5 = x / 3 3 / 2:1 / 3 = x: 8 x: 9 / 2 = 1 / 3:2 (solution ratio)
- 2. Solution ratio (X: 12 = 0.5:1 / 3)
- 3. The solution ratio is 2.25 of x = 3.75 of 2, 11 of 12:5 of 4 = 35 of 36:x
- 4. List the proportions according to the conditions, and find out that the ratio of 8 / 9 to X is equal to 6 and the ratio of 3 / 4 to 9 List the proportion according to the condition and solve the proportion The ratio of eight ninths to X is equal to the ratio of six to three fourths By 9:00
- 5. The ratio of X to 3 / 4 is equal to the ratio of 8 to 1.2
- 6. The ratio of 4.5 to X is equal to the ratio of 9 to 0.4
- 7. List the proportions according to the following conditions, and the ratio of the solution proportion 45 and X is equal to the ratio of 25 and 8. The two external terms are 24 and 18, and the two internal terms are x and 36
- 8. 7: X = 4.8:9.6 16: x = 2.4:3 3:12:11 = x: 8:3:10:9 = x: 12:15 = 2: X 1:4 x = 2:3 x = 16.5 x = 5.2 X: 3:4 x = 12:8 X: 1:7 X: 2 = 1:4 X: 30 x = 15 1:4 X: 1.25 x = 2.25:0.25 8 x: 3:10 9 = x: 24 6:25 9 = 5:4 X: all the solutions are proportional
- 9. Proportion (continuous) (left and right) 2.5:1 7:12 9:5 2.1:0.9 7:3 1:0.4 1 / 6: 2 / 7 20:11 and 1 / 9 2.5:1 9:5 7:3 1 / 6: 2 / 7 (left) 7: 12 2.1:0.9 1:0.4 20:11 and 1 / 9 (right)
- 10. Solution ratio 5:8 = 40: X 0.4:1.5 = x: 2.50.2: x = 4:40% x = 1:4:1:4 = 3:8 10: 1 / 5 = 20.5:0.5
- 11. (1.25 + x): 0.25 = x: 1.6 solution ratio
- 12. Solution ratio: 1 / 2: 1 / 4: X
- 13. The solution is 0.5 out of 6
- 14. Binary linear equations 2x-5y plus 3 equals 0ax-y = 7
- 15. A piece of iron wire is m decimeter long. It is used to form a square and a circle. The square area is () A. 1 / 2 B.2 times C. π / 4 D.4 π times
- 16. 1. The equation (2x + 1) - (y + 3) = x + y is transformed into a formula containing x to express y, and the corresponding values of Y are obtained when x = - 2,0.1, two fifths respectively 2. Write a group of integer solutions, a group of negative integer solutions and a group of positive integer solutions of the quadratic equation 4x-3y = 15 (add 20 points to the formula)
- 17. Solving X-Y = 500 and X + 15 ‰ X - [Y-10 ‰ y] = 950 by the method of adding, subtracting and eliminating elements of binary linear equations
- 18. In the bivariate linear equation x + 6y-4 = 0, when x is equal to 4, how much is y; when y = - 1, how much is x?
- 19. Bivariate linear equation: X / 3-y / 4 = x / 2 + Y / 3-10 = 3 (with process) There is another problem: when solving the equations {ax + by = 26, the correct solution is {x = 4) cx+y=6 y=-2 Because Xiao Ming wrongly wrote C, the solution is {x = 7} y=3 The correct values of Qiu a, B, C When {ax + by = 26 CX + y = 6, {x = 4, y = - 2 And the above question!
- 20. The inverse scale function y = - 2 / x, when x is greater than 2, the value range of Y is --- when x is less than or equal to 2, the value range of Y is --- when 1 is less than or equal to X