3. Solve the following simultaneous eq(1) 3x - 4y = 10 ; 4x + 3y = 5

1.	3. Solve the following simultaneous eq(1) 3x - 4y = 10 ; 4x + 3y = 5
Answer» 3x - 4y = 10, 4x +3y =5; 4(3x-4y=10); 3(4x+3y =5); 12x - 16y = 40; 12x + 9y = 15; 12x +9y = 15/25y = 30; y = 30/25=6/5; 3x -4(6/5)=10; 3x = 10+ 24/5 = 50+24/5=75/5; x = 75 /5×3=25/5=5 -10/7 is correct answer.

Answer»

3x - 4y = 10, 4x +3y =5; 4(3x-4y=10); 3(4x+3y =5); 12x - 16y = 40; 12x + 9y = 15; 12x +9y = 15/25y = 30; y = 30/25=6/5; 3x -4(6/5)=10; 3x = 10+ 24/5 = 50+24/5=75/5; x = 75 /5×3=25/5=5

-10/7 is correct answer.

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3. Solve the following simultaneous eq(1) 3x - 4y = 10 ; 4x + 3y = 5

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