Question

solve x and y
x+y=3
4x-3y=26
​

Answer 1

Answer:

To solve the system of equations

x+y=3

4x-3y=26

by using substitution method as, y=3-x put in second equation

4x-3(3-x)=26

4x-9+3x=26

7x=35

by dividing with 7

x=5 and y=3-5=-2

Answer

x=5, y=-2

Step-by-step explanation:

Answer 2

$x + y = 3 - - take \: it \: as \: eq(1)$

$4x - 3y = 26 \: - - take \: it \: as \: eq(2)$

multiply eq(1) with 3,

$3x + 3y = 9 \: - - eq(3)$

Add eq(2) and eq(3),

$4x - 3y = 26 \\ 3x + 3y = 9 \\ - - - - - - \\ 7x + 0 = 35 \\ \\ 7x = 35 \\ x = \frac{35}{7} \\ x = 5$

Substitute value of x in eq(1),

$x + y = 3 \\ 5 + y = 3 \\ y = 3 - 5 \\ y = - 2$