Advertisements
Advertisements
प्रश्न
Solve the following equation by the trial-and-error method: 4x = 28
उत्तर
4x = 28
We try several values of x until we get the L.H.S. equal to the R.H.S.
| x | L.H.S. | R.H.S. | Is L.H.S. = R.H.S.? |
| 1 | 4 × 1 = 4 | 28 | No |
| 2 | 4 × 2 = 8 | 28 | No |
| 3 | 4 × 3 = 12 | 28 | No |
| 4 | 4 × 4 = 16 | 28 | No |
| 5 | 4 × 5 = 20 | 28 | No |
| 6 | 4 × 6 = 24 | 28 | No |
| 7 | 4 × 7 = 28 | 28 | Yes |
∴ x = 7
APPEARS IN
संबंधित प्रश्न
Solve the following equation by trial and error method:
3m - 14 = 4
Write the given equation in statement form:
m − 7 = 3
Set up an equation in the following case:
Irfan says that he has 7 marbles more than five times the marbles Parmit has. Irfan has 37 marbles. (Take m to be the number of Parmit’s marbles.)
Simplify:
86 − [15x − 7(6x − 9) −2{10x − 5(2 − 3x)}]
Solve the following equation and verify the answer:
`(3x)/5`=15
Solve the following equation and verify the answer:
5x − 3 = x + 17
Solve the following equation and verify the answer:
6x + 5 = 2x + 17
Given n students in the class like football, what may 2n show? What may show? (Hint: Think of games other than football).
State which of the following are equations (with a variable). Give reason for your answer. Identify the variable from the equations with a variable.
2m < 30
x exceeds 3 by 7, can be represented as ______.
