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प्रश्न
The equation given below is followed by the value of the variable. Decide whether this value is the solution to that equation.
x − 4 = 3, x = −1, 7,−7
उत्तर
x − 4 = 3, x = -1, 7,-7
Substituting x = – 1 in L.H.S. of equation (i),
L.H.S. = (-1) – 4 = – 5
R.H.S. = 3
∴ L.H.S. ≠ R.H.S.
∴ x = – 1 is not the solution of the given equation.
Substituting x = 7 in L.H.S. of equation (i),
L.H.S. = (7) – 4 = 3
R.H.S. = 3
∴ L.H.S. = R.H.S.
∴ x = 7 is the solution of the given equation.
Substituting x = – 7 in L.H.S. of equation (i),
L.H.S. = (–7) – 4 = –11
R.H.S. = 3
∴ L.H.S. ≠ R.H.S.
∴ x = –7 is not the solution of the given equation.
Hence, x = 7 is the solution of the equation.
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