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Sagot :
To find the value of input value 'x' of the function substitute the value of output value f(x) in the given function.
If f(x) = 2x - 3 and we have to find the values of 'x' for f(x) = 15
Substitute the value of f(x) in the given function,
15 = 2x - 3
2x = 15 + 3
2x = 18
x = 9
- If g(x) = 3x + 2
- For g(x) = 11
11 = 3x + 2
3x = 11 - 2
3x = 9
x = 3
- If w(x) = 3x - 7
- For w(x) = 14
114 = 3x - 7
3x = 21
x = 7
- If h(x) = -2x - 5
- For h(x) = -25
-25 = -2x - 5
25 = 2x + 5
2x = 20
x = 10
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