Natasha had 2356 beads, lydia had 1176 beads and munah had 1708
beads at first. after they each used an equal number of beads, natasha
had 3 times as many beads left as lydia. how many beads did each of
them use?

According to question,

Let x be tha beads used.

Then ,

( 2356 - ×)=3(1176-×)

=> 2356 - x = 3528 - 3x

=> 3x - x = 3528 - 2356

=> 2x = 1172

=> x = 586

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according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

i think the answer is b