brendavcallejas
brendavcallejas
25-06-2018
Mathematics
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What is the value of x?
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sqdancefan
sqdancefan
25-06-2018
The rule for secants tells you
EC·ED = EB·EA
(x+4)(x+5) = (x+1)(x+12)
9x+20 = 13x+12 . . . . . . simplify, subtract x²
8 = 4x . . . . . . . . . . . . . . add -12-9x
2 = x
The value of x is 2.
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