Find x and the perimeter of the triangle.

x=
perimeter=

x=10

perimeter=129

step wise

4x+7=5x-3

4x-5x=-7-3

-1x=-10

x=10

then,

perimeter=(4×10+7)+(5×10-3)+(4×10-5)

=129 answer

these sign is used to tell weather the number is greater or less than the number   <   or >     but this sign means its equal =    

hope this you and

step-by-step explanation: