Question

) 3х - 4 y = 10; 4х + Зу = 5​

Answer 1

hello mate you dont said , which formula have to use.....

so iam doing elemination method.......

here we go.......

3x-4y =10 × 4

4x+3y =5 × 3

im equalizing.....

12x-10y = 40

12x+15y = 15

I'm going to eliminate x...so..change the symbols of 2and equation......

12x-10y = 40

- 12x-10y =- 15

__________

- 20y = 25

y = 25 / -20

y = - 5 / 4

3x - 4×-5/4 = 10

3x + 20 /4 = 10

3x + 5 = 10

3x = 10 - 5

3x = 5

x = 5 / 3

3×5/3 - 4× - 5 / 4 = 10

15 / 3 + 20 / 4 = 10

5 + 5 = 10 hence solved