Question

Question math genius help but preparation for tmrw math exam

a) 2x-y-3=0,4x+y-3=0
lots of thx if u helped ​

Answer 1

Explanation:

make sure to number your equations

`2x - y - 3 = 0 \: \: \: \: \: \: \: \: \: \: \: (1)`

`4x + y - 3 = 0 \: \: \: \: \: \: \: \: \: \: \: \: \: (2)`

In equation 2 make y the subject

`y = - 4x + 3 \: \: \: \: \: \: \: \: \: (3)`

subs 3 into 1

`2x - ( - 4x + 3) - 3 = 0`

`2x + 4x - 3 - 3 = 0`

`6x - 6 = 0`

`6x = 6`

`x = 1 \: \: \: \: \: \: \: \: \: \: \: (4)`

sub's 4 into 2

`4(1) + y - 3 = 0`

`4 + y - 3 = 0`

`y = - 4 + 3`

`y = - 1`