Question

4. Solve the following pairs of linear equations
by the method of cross-multiplication:
(1) -
(2) ă + = 0, (a + b) x + (a - b) y = a2 + b2
y
y
9
40
3
5
12
(3) 4x - 19y + 13 = 0. 13x - 23y + 19 = 0​

Answer 1

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