X-2/16=3/4 1/2-y=2/8 2+1/2+3+1/3+4+1/4+5+1/5+6+1/6
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20 января 2025 18:43
Let's solve the equations and simplify the expression step-by-step:
Solve the first equation: [ \frac{x - 2}{16} = \frac{3}{4} ] Multiply both sides by 16: [ x - 2 = 12 ] Add 2 to both sides: [ x = 14 ]
Solve the second equation: [ \frac{1}{2} - y = \frac{2}{8} ] Simplify (\frac{2}{8}) to (\frac{1}{4}): [ \frac{1}{2} - y = \frac{1}{4} ] Subtract (\frac{1}{2}) from both sides: [ -y = \frac{1}{4} - \frac{1}{2} ] The common denominator is 4, so rewrite (\frac{1}{2}) as (\frac{2}{4}): [ -y = \frac{1}{4} - \frac{2}{4} = -\frac{1}{4} ] Multiply both sides by -1: [ y = \frac{1}{4} ]
Simplify the expression: [ 2 + \frac{1}{2} + 3 + \frac{1}{3} + 4 + \frac{1}{4} + 5 + \frac{1}{5} + 6 + \frac{1}{6} ]
First, combine the whole numbers: [ 2 + 3 + 4 + 5 + 6 = 20 ] Now, add the fractions: [ \frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \frac{1}{5} + \frac{1}{6} ] To add these fractions, we need a common denominator. The least common multiple (LCM) of (2, 3, 4, 5, 6) is 60. Now convert each fraction: [ \frac{1}{2} = \frac{30}{60}, \quad \frac{1}{3} = \frac{20}{60}, \quad \frac{1}{4} = \frac{15}{60}, \quad \frac{1}{5} = \frac{12}{60}, \quad \frac{1}{6} = \frac{10}{60} ] Now add them: [ \frac{30}{60} + \frac{20}{60} + \frac{15}{60} + \frac{12}{60} + \frac{10}{60} = \frac{97}{60} ] Finally, combine the whole number sum with the fraction: [ 20 + \frac{97}{60} = \frac{1200}{60} + \frac{97}{60} = \frac{1297}{60} ]
Thus, the final answers are:
- (x = 14)
- (y = \frac{1}{4})
- The simplified expression is (\frac{1297}{60}) or approximately (21.62).
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