Solve for (x, y) elimination method. show your work 2x + y = 5 x - y = 1
1 answer:
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Answer with Step-by-step explanation:
We are given that a function
Assign each whole number to its largest place value digit.
We have to find the value of x that makes the equation 7 a true statement.
When f(x)=7
Then, the possible values of x are 7,127,27,257,... .
Because f(7)=7
f(127)=7
f(27)=7
f(257)=7
Therefore, the value of x =7,127,257,27,..