Advertisements
Advertisements
प्रश्न
Solve the following equation and verify the answer:
4x + 7 = 15
उत्तर
4x + 7 = 15
⇒ 4x + 7 − 7 = 15 − 7 [Subtracting 7 from both the sides]
⇒ 4x = 8
⇒ `(4x)/4`=84 [Dividing both the sides by 4]
⇒ x = 2
Verification:
Substituting x = 2 in the L.H.S.:
⇒ 4×2 + 7 = 8 + 7 = 15 = R.H.S.
L.H.S. = R.H.S.
Hence, verified.
APPEARS IN
संबंधित प्रश्न
Set up an equation in the following case:
Laxmi’s father is 49 years old. He is 4 years older than three times Laxmi’s age. (Take Laxmi’s age to be y years.)
Simplify:
−a − [a + {a + b − 2a − (a − 2b)} − b]
Write a statement for the equation, given below:
2x − 3 = 13
Solve the following equation and verify the answer:
x − 7 = 6
Solve the following equation and verify the answer:
`2x-1/2=3`
Solve the following equation and verify the answer:
The shifting of a number from one side of an equation to other is called transposition
Answer the following:
Take Sarita’s present age to be y years
- What will be her age 5 years from now?
- What was her age 3 years back?
- Sarita’s grandfather is 6 times her age. What is the age of her grandfather?
- Grandmother is 2 years younger than grandfather. What is grandmother’s age?
- Sarita’s father’s age is 5 years more than 3 times Sarita’s age. What is her father’s age?
State which of the following are equations (with a variable). Give reason for your answer. Identify the variable from the equations with a variable.
7 − x = 5
Pick out the solution from the values given in the bracket next to each equation. Show that the other values do not satisfy the equation.
r − 4 = 0 (4, − 4, 8, 0)
