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xosam98sammy98 xosam98sammy98
  • 14-10-2015
  • Mathematics
Answered

How do you solve 4x+2y=10 x-y=13 using substitution

Verified Answer :

darth666
darth666 darth666
  • 14-10-2015

\(\left \{ {{4x+2y=10} \atop {x-y=13}} \right.\)

\(x=13+y\)

\(4(13+y)+2y=10\)

\(52+4y+2y=10\)

\(6y=-42\)

\(y=-\frac{42}{6}=-7\)

\(y=-7\)

\(x=13-7=6\)

\(\left \{ {{x=6} \atop {y=-7}} \right.\)

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