Question

4 ) Solve for x : (3 x + 10 ) / (5 x + 10 ) = 5/7​

Answer 1

Answer:

x = 5

Step-by-step explanation:

(3x + 10) / (5x + 10) = 5/7 ........ (cross multiply)

7(3x + 10) = 5(5x + 10)..........(open the bracket)

21x + 70 = 25x + 50.........(bring the variables to one side)

70 - 50 = 25x -21x

20 = 4x

4x = 20

x = 20 / 4

∴x  = 5

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Answer 2

Answer:

5

Step-by-step explanation:

$\frac{(3x + 10)}{(5x + 10) } = \frac{5}{7}$

$21x + 70 = 25x + 50$

$25x - 21x = 70 - 50$

$4x = 20$

$x = \frac{20}{4}$

$x = 5$