you just cant only if u subtract 45-0=45
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45
45% off, means you calculate 45%, then subtract from the original amount.45%=0.450.45 * 75.00 = 33.7575.00 - 33.75 = 41.25
45 + 3n = -45 Subtract 45 from both sides: 3n = -90 Divide both sides by 3: n = -30
45 = 30 + m Subtract 30 from both sides: 15 = m
The rule of the pattern 50 40 45 35 is subtract 10 then add 5.