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2x-9y=14

x=-6y+7

x=

y=

2x9y=14 2 x-9 y=14 \newlinex=6y+7 x=-6 y+7 \newlinex= x= \newliney= y=

Full solution

Q. 2x9y=14 2 x-9 y=14 \newlinex=6y+7 x=-6 y+7 \newlinex= x= \newliney= y=
  1. Substitute xx in first equation: Substitute the value of xx from the second equation into the first equation.\newlineGiven the second equation x=6y+7x = -6y + 7, we can replace xx in the first equation with 6y+7-6y + 7.\newlineSo, 2x9y=142x - 9y = 14 becomes 2(6y+7)9y=142(-6y + 7) - 9y = 14.
  2. Distribute 22 across terms: Distribute 22 across the terms inside the parentheses. \newline2(6y+7)9y=142(-6y + 7) - 9y = 14\newline12y+149y=14-12y + 14 - 9y = 14
  3. Combine like terms: Combine like terms.\newline12y9y+14=14-12y - 9y + 14 = 14\newline21y+14=14-21y + 14 = 14
  4. Isolate term with y: Subtract 1414 from both sides to isolate the term with y.\newline21y+1414=1414-21y + 14 - 14 = 14 - 14\newline21y=0-21y = 0
  5. Divide both sides: Divide both sides by 21-21 to solve for yy.21y21=021\frac{-21y}{-21} = \frac{0}{-21}y=0y = 0
  6. Substitute yy back for xx: Substitute the value of yy back into the second equation to solve for xx.\newlinex=6y+7x = -6y + 7\newlinex=6(0)+7x = -6(0) + 7\newlinex=0+7x = 0 + 7\newlinex=7x = 7

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