anonymous
  • anonymous
y = 3x + 3 y = x − 1 Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.
Pre-Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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TheSmartOne
  • TheSmartOne
Any ideas?
TheSmartOne
  • TheSmartOne
Do you know what the substitution method is?
TheSmartOne
  • TheSmartOne
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anonymous
  • anonymous
just flip it to the other side y=3x+3 becomes y-3/3=x and y=x-1 becomes y+1=x
anonymous
  • anonymous
thanksss
texaschic101
  • texaschic101
y = 3x + 3......so now we substitute 3x + 3 in for y in the other equation y = x - 1 3x + 3 = x - 1 --- subtract x from both sides 3x - x + 3 = x - x - 1 -- combine like terms 2x + 3 = -1 --- subtract 3 from both sides 2x + 3 - 3 = -1 - 3 -- combine like terms 2x = -4 -- divide both sides by 2 2/2x = -4/2 x = -2 now we sub in -2 for x in either of the original equations to find y y = 3x + 3 y = 3(-2) + 3 y = -6 + 3 y = -3 now we check.. y = x - 1 -3 = -2 -1 -3 = -3 (correct) so your solution is : (-2,-3)

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