Question

3x-1/5-x/7=3.Find the value of in the following case
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Answer 1

Answer:

x = 112/100

Step-by-step explanation:

3x -1/5 -x/7 = 3

3x - x/7 = 3 +1/5

(21x - x)/7 = 16/5

20 x / 7 = 16/5

100 x = 112

x = 112/100

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Answer 2

GIVEN:

• (3x - 1/5) -( x/7 ) = 3

TO FIND:

• The value of x

SOLUTION:

$\bf \: \implies \: \frac{3x - 1}{5} \: - \: \frac{x}{7} = 3 \\ \\ \bf \: \implies \: \frac{7(3x - 1)}{5 \times 7} \: - \: \frac{5x}{7 \times 5} = 3\\ \\ \bf \: \implies \: \frac{21x - 7}{35} \: - \: \frac{5x}{35} = 3 \\ \\ \bf \: \implies \: \frac{21x - 7 - 5x}{35} = 3 \\ \\ \bf \: \implies \: \frac{21x - 5x - 7}{35} = 3 \\ \\ \bf \: \implies \: \frac{16x - 7}{35} = 3 \\ \\ \bf \: \implies \: 16x - 7 = 3 \times 35 \\ \\ \bf \: \implies \: 16x - 7 = 105 \\ \\ \bf \: \implies \: 16x = 105 + 7 \\ \\ \bf \: \implies \: x = \frac{112}{16} \\ \\ \bf \: \implies \: x = 7$

Therefore, the value of x is 7.