Question

Solve the equation by elimination method .
3x – 5 y – 18 =0 ; x = 3y + 10

Answer 1

Step-by-step explanation:

3x – 5y – 18 = 0 ; x = 3y + 10

3(3x – 5y = 18) ; 5(x - 3y = 10)

9x - 15y = 54----(1) ; 5x - 15y = 50-------(2)

By elimination method

subtraction (2)from(1)

9x - 15y = 54

5x - 15y = 50

_–__+____–__

4x = 4

x = 4/4

x = 1

using equation x = 1 in (1)

5(1) - 15y = 50

5 - 15y = 50

-15y = 50-5

y = -45/15

y = -3