1.

Solve : ax+by = a-b bx-ay =a+b by by SUBSTITUTION only.

Answer»

ANSWER:

> 240 { {x13 \times 28 - 2x {1xx042y71)2x11x1xyx5 < 3160 \times \frac{?}{?} }^{?} }^{2} }^{2}



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