3х - 5у = 19, 7x - Зу = 1
solve by cross multiplication method
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Step-by-step explanation:
3x - 5y = 19
( cross multiplication)
7x - 3y = 1
(3x × (-3y )) ( -5y × 7x ) 19×1
-9xy × -35yx × 19
-31x^2 y^2 ×19
- 279x^2y^2
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