Question

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

Answer 1

Answer:

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