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Solve the equations and check your answer in the case:
`(2)/(3)(3x-2)=(4)/(5)(2x-3) -(4)/(3)`

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The correct Answer is:
To solve the equation \(\frac{2}{3}(3x-2) = \frac{4}{5}(2x-3) - \frac{4}{3}\), we will follow these steps: ### Step 1: Distribute the fractions on both sides of the equation. We start by distributing \(\frac{2}{3}\) on the left side and \(\frac{4}{5}\) on the right side. \[ \frac{2}{3}(3x) - \frac{2}{3}(2) = \frac{4}{5}(2x) - \frac{4}{5}(3) - \frac{4}{3} \] This simplifies to: \[ 2x - \frac{4}{3} = \frac{8}{5}x - \frac{12}{5} - \frac{4}{3} \] ### Step 2: Find a common denominator for the fractions. The common denominator for 5 and 3 is 15. We will convert all fractions to have a denominator of 15. \[ 2x - \frac{4 \times 5}{15} = \frac{8 \times 3}{15}x - \frac{12 \times 3}{15} - \frac{4 \times 5}{15} \] This gives us: \[ 2x - \frac{20}{15} = \frac{24}{15}x - \frac{36}{15} - \frac{20}{15} \] ### Step 3: Combine like terms on the right side. Combine the constants on the right side: \[ 2x - \frac{20}{15} = \frac{24}{15}x - \frac{56}{15} \] ### Step 4: Move all terms involving \(x\) to one side and constant terms to the other side. Rearranging gives: \[ 2x - \frac{24}{15}x = -\frac{56}{15} + \frac{20}{15} \] This simplifies to: \[ 2x - \frac{24}{15}x = -\frac{36}{15} \] ### Step 5: Convert \(2x\) to have a common denominator. Convert \(2x\) to have a denominator of 15: \[ \frac{30}{15}x - \frac{24}{15}x = -\frac{36}{15} \] ### Step 6: Combine the \(x\) terms. This gives: \[ \frac{6}{15}x = -\frac{36}{15} \] ### Step 7: Solve for \(x\). Multiplying both sides by \(\frac{15}{6}\): \[ x = -\frac{36}{6} = -6 \] ### Step 8: Check the solution. Substituting \(x = -6\) back into the original equation: Left side: \[ \frac{2}{3}(3(-6) - 2) = \frac{2}{3}(-18 - 2) = \frac{2}{3}(-20) = -\frac{40}{3} \] Right side: \[ \frac{4}{5}(2(-6) - 3) - \frac{4}{3} = \frac{4}{5}(-12 - 3) - \frac{4}{3} = \frac{4}{5}(-15) - \frac{4}{3} = -12 - \frac{4}{3} \] Finding a common denominator for \(-12\) and \(-\frac{4}{3}\): \[ -12 = -\frac{36}{3} \implies -\frac{36}{3} - \frac{4}{3} = -\frac{40}{3} \] Both sides equal \(-\frac{40}{3}\), confirming our solution is correct. ### Final Answer: \[ x = -6 \]
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ICSE-LINEAR EQUATIONS-EXERCISE 14A
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