Suppose , , and . Which of the following equalities must be…

MATHEMATICS · Single correct · CBSE · Mathematics · We Distribute, Yet Things Multiply · We Distribute, Yet Things Multiply

Problem

Suppose p+q=r+sp+q = r+s, r+s=t+ur+s = t+u, and q=uq = u. Which of the following equalities must be true? (a) p=up = u (b) p=qp = q (c) p=tp = t (d) p=rp = r

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