Question

Icated (Q#1-4).

2. Solve by substitution; x+3y + 4)
3x - 5y = 8
3 (3x+4)
aytla

Answer 1

See explanation

Explanation:

Assuming your system is:

`x + 3y = 4`

`3x - 5y = 8`

Then make x the subject in the first equation to get:

`x = 4 - 3y`

Put this equation into the second equation to get:

`3(4 - 3y) - 5y = 8`

`12 - 9y - 5y = 8`

`- 9y - 5y = 8 - 12`

`-14y = - 4`

`y = ( - 4)/( - 14) = (2)/(7)`

This means that:

`x = 4 - 3 * (2)/(7)`

`x = 4 - (6)/(7) = (22)/(7)`