8x + 12 + B = 14x + 21
B = 6x+9
ratio = (6x+9)/(14x + 21) = 3/7 since 2x+3 = 0 makes no physical sense!
An isosceles triangle has two sides of length 4x + 6. The perimeter of the triangle is 14x + 21. What is the ratio of the base to the perimeter?
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