(100 - 100)/(100 - 100)
invert and multiply
(100 - 100) * 1/(100 - 100)
100 - 100
----------------------is a factor in both numerator and denominator of the multiplicands , so canceled.
= 1
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Z=153.
×/11-9=-8 what is ×
(100 - 100 / 100 - 100) = 2 => 102 - 102 / 10(10 - 10) =2 => (10 + 10) (10 - 10) / 10(10 - 10) = 2 [a2 - b2 = (a + b) (a - b)] Cancelling ( 10 - 10 ) {numerator} from ( 10 - 10 ) {denominator} => ( 10 + 10 ) / 10 = 2 => 20 / 10 = 2 => 2 = 2 [Hence, Proved]
48
-10x = -50 Divide both sides by -10 remembering that a minus divided by a minus the quotient then becomes positive: x = 5 So: -10*5 = -50