Question

Could someone please help me with this thank you very much

Answer 1

Answer for #10:

`y = 2 \: and \: x = 1`

Answer for #1:

`x = 2 \: and \: y = - 1`

Explanation:

In order to solve a simultaneous equation using the substitution method you have to:

Use one of the equation and substitute it into the other equation, in this case equation B was substituted into equation A.

`equ. \: a = (2x - 3y = 7) \\ equ. \: b = (x = 1 - y)`

Therefore since x = 1 - y, equation A would be:

`2(1 - y) - 3y = 7 \\ (2 - 2y) - 3y = 7 \\ - 2y - 3y = 7 - 2 \\ - 5y = 5 \\ y = - 1 \: and \: x = 2`