Question

-5x+4y=21
3x+5y=17
me resolveis los sistemas compatibles determinados

doy 87 puntos

Answer 1

Respuesta:

Explicación paso a paso:

Answer 2

Solution for 5x-4y=21 equation:

Simplifying

5x + -4y = 21

Solving

5x + -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.

5x + -4y + 4y = 21 + 4y

Combine like terms: -4y + 4y = 0

5x + 0 = 21 + 4y

5x = 21 + 4y

Divide each side by '5'.

x = 4.2 + 0.8y

Simplifying

x = 4.2 + 0.8y

La otra solución

3x+5y=17

_________

3y=3

y=3/3

y=1

__________

3x+5(1)=17

3x+5=17

3x=17-5

3x=12

x=12/3

x=4