If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.

−x + 5y = 1
2x + 4y = −4

Question

10-11-2016
Mathematics

contestada

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.

−x + 5y = 1
2x + 4y = −4

Respuesta :

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ampofoeugenia7 ampofoeugenia7 · Answer 1 · 2016-11-11T17:58:56+01:00

-x+5y=1 -x+5y-5y=1-5y -x=1-5y -x/-1=1/-1 -5y/-1 x=-1+5y so the expression equivalent to x is -1+5y. Now the substitution

2x+4y=-4 -2+14y=-4 14y/14=-2/14
2(-1+5y)+4y=-4 -2+2+14y=-4+2 y=-1/7
-2+10y+4y=-4 14y=-2
x=-1+5y
x=-1+5(-1/7) x=-1-5/7 x=-12/7. So x=-12/7 and y=-1/7

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation. −x + 5y = 1 2x + 4y = −4

Respuesta :

Otras preguntas

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.

−x + 5y = 1
2x + 4y = −4