Question

y=2x-1
2x+y=3
how do i solve this substitution problem

Answer 1

Step-by-step explanation:

$y=2x-1 \: \: \: \: \: \: \: ..(1) \\

2x+y=3 \: \: \: \: \: \: \:...(2) \: \: \: \: \: \: (given)$

put equation 1 in equation 2

$

2x+2x - 1=3 \\ 4x = 4 \\ x = \frac{4}{4} = 1 \\ \\ x = 1$

$

2(1)+y=3 \\ 2 + y = 3 \\ y = 3 - 2 \\ y = 1$