kak toling jawab please TT

3x + y = -1 |x 3|
2x + 3y = 10

9x + 3y = -3
2x + 3y = 10
––––––––– (–)
7x = -13
x = - 13/7

Subtitusikan
2(-13/7) + 3y = 10
3y = 10 + 26/7
3y = 96/7
y = 32/7

Titik potong yang dimaksud (- 13/7 , 32/7)

Persamaan garis antara (-13/7 , 32/7) dan (2 , 1)
m = Δy / Δx
m = (32/7 - 1) / (-13/7 - 2)
m = -25 / 27

Persamaanya
y - y₁ = m(x - x₁)
y - 1 = - ²⁵/₂₇ (x - 2) [x -27]
-27y + 27 = 25(x - 2)
-27y + 27 = 25x - 50
25x + 27y - 77 = 0