anonymous
  • anonymous
here is the 2nd problem: 15x-20y=7 & 15y=-4+5x. Solve by the substitution method.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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yuki
  • yuki
Wow, elimination sounds a lot easier for this one, huh?
yuki
  • yuki
if we solve for the right equation for x, we will get x = 3y + 4/5
yuki
  • yuki
all you have to do is to plug this in into the equation 15x -20y = 7

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yuki
  • yuki
it's gonna look like this 15 (3y+4/5) -20y =7
yuki
  • yuki
Then you just solve for y :)
anonymous
  • anonymous
ok I came up with y--1/5

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