Question

Solve the following by cross multiplication 4x-3y=23, 3x+4y=11

Answer 1

Answer:

// Solve equation [2] for the variable y

[2] 4y = -3x + 11

[2] y = -3x/4 + 11/4

// Plug this in for variable y in equation [1]

[1] 4x - 3•(-3x/4+11/4) = 23

[1] 25x/4 = 125/4

[1] 25x = 125

// Solve equation [1] for the variable x

[1] 25x = 125

[1] x = 5

// By now we know this much :

x = 5

y = -3x/4+11/4

// Use the x value to solve for y

y = -(3/4)(5)+11/4 = -1

Answer 2

Step-by-step explanation:

4x-3y=23

3x+4y=11

4x=23+3y

X=23+3y/4

3 (23+3y/4)+3y

69+9y/4+3y

69+4y+12y/4

69+16y/4