y = x - 1 ------- equation 1
2x - 3y = -1 equation 2
Since, y = x - 1 in equatiion 1
substitute y = x - 1 in equation 2
2x - 3(x - 1) = -1
Open the parenthesis
2x - 3x + 3 = -1
Collect the like terms
2x - 3x = -1 - 3
-x = -4
Divide both sides by -1
-x/-1 = -4/-1
x = 4
To find y, substitute the value of x into equation 1
y = x - 1
y = 4 - 1
y = 3
The answer is x = 4 and y = 3
