Question

Równania : a ) 3x - 2y = 1 y = x + 5 b ) x - y = 4 4x + 5y = 1

Answer 1

3x-2y=1

3x=1+2y

3x=3y/:3

x=1y

 

y=x+5

x=5-y

x=4y

 

x-y=4

x=4-y

x=3y

 

4x+5y=1

4x=1-5y

4x=-4y/:4

x=-1y