Question

Solve the following linear equations 3x+2y=4, 8x+5y=9​

Answer 1

8x +5y =9

Subtract 8x both sides we get

5y = 9 – 8x

Divide by 5

Y = (9 – 8 x)/5 …(3)

Plug this value of y in equation second we get

3x +2y =4

3x + 2(9 – 8 x)/5) = 4

Multiply by 5 we get

15 x + 18 - 16 x = 20

-x = 2

X = - 2

Plug this value back in equation (3) we get

Y = (9- 8(-2))/5

Y = 25/5

Y = 5

Answer is x = -2 and y = 5