Question 416973


{{{x + y = -4}}} .........1 
{{{y = 3x + 2}}}...........2
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{{{x + y = -4}}} .........1 ...solve for {{{x}}}

{{{x = -y -4}}} ...plug in 2

{{{y = 3(-y -4) + 2}}}

{{{y = -3y -12 + 2}}}

{{{y +3y= -10 }}}

{{{4y= -10 }}}

{{{y= -10/4 }}}

{{{y= -2.5 }}}


{{{x = -y -4}}} ...plug in {{{y}}}

{{{x = -(-2.5) -4}}}

{{{x = 2.5 -4}}}

{{{x = -1.5}}}


check:


{{{x + y = -4}}} .........1 


{{{ -1.5 + (-2.5) = -4}}} 

{{{ -1.5 -2.5 = -4}}} 

{{{ -4 = -4}}}