Respuesta :
x + 4y = 21.....................................(1)
4x - y = 16 Multiply this by 4:-
16x - 4y = 64 ...................................(2)
Add (1) and (2):-
17x = 85
x = 5
Plug this into equation (1):-
5 + 4y = 21
4y = 16
y = 4
Answer is x = 5, y = 4.
4x - y = 16 Multiply this by 4:-
16x - 4y = 64 ...................................(2)
Add (1) and (2):-
17x = 85
x = 5
Plug this into equation (1):-
5 + 4y = 21
4y = 16
y = 4
Answer is x = 5, y = 4.
[tex]Simplifying
x + 4y = 21
Solving
x + 4y = 21
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-4y' to each side of the equation.
x + 4y + -4y = 21 + -4y
Combine like terms: 4y + -4y = 0
x + 0 = 21 + -4y
x = 21 + -4y
Simplifying
x = 21 + -4y[/tex]
[tex]Simplifying 4x + -16 = y Reorder the terms: -16 + 4x = y Solving -16 + 4x = y Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + 4x = 16 + y Combine like terms: -16 + 16 = 0 0 + 4x = 16 + y 4x = 16 + y Divide each side by '4'. x = 4 + 0.25y Simplifying x = 4 + 0.25y[/tex]
[tex]Simplifying 4x + -16 = y Reorder the terms: -16 + 4x = y Solving -16 + 4x = y Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + 4x = 16 + y Combine like terms: -16 + 16 = 0 0 + 4x = 16 + y 4x = 16 + y Divide each side by '4'. x = 4 + 0.25y Simplifying x = 4 + 0.25y[/tex]
