Two equal sides of a triangle are (5x+3) and (6x-3).find value of x .if the perimeter is 141 cm .find third side?

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Answer 1 · 2018-06-20T09:34:53

#color(blue)(x=33)#

#color(blue)("third side"=75cm)#

If the two equal sides are:

#(5x+3) and (6x-3)#

Then:

#(5x+3) =(6x-3)#

#6x-5x=3+3#

#x=6#

The two equal sides are then:

#(5(6)+3)=33cm#

The perimeter is the sum of all the sides:

Let the third side be #c#

#:.#

#"perimeter"=33+33+c=141#

#c=141-33-33=75cm#