Twice the difference of a number and 9 is 5 Use the variable c for the unknown number.
1 answer:
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Answer:
x = - 7
Step-by-step explanation:
Using the rule of exponents
×
=
Given
×
= 6², then
= 6²
Since the bases on both sides are equal then equate the exponents
9 + x = 2 ( subtract 9 from both sides )
x = - 7