Question

If (5x + 3) : (7x + 3)= 3:4, find the value of x.

Answer 1

Question:

If (5x + 3) : (7x + 3)= 3:4, find the value ofx.

Answer:

5x+3/7x+3=3/4

4(5x+3)=3(7x+3)

20x+12=21x+9

20x-21x=9-12

-x=-3

x=3

Hope it helps you.

Thank you.

Answer 2

Answer:

Put x=−3 in the given expression, we get

2x ^4 −5x ^3 +7x−3

=2(−3) ^4 −5(−3) ^3 +7(−3)−3

=162+135−21−3=273