Substitute x in first equation: Substitute the value of x from the second equation into the first equation.Given the second equation x=−6y+7, we can replace x in the first equation with −6y+7.So, 2x−9y=14 becomes 2(−6y+7)−9y=14.
Distribute 2 across terms: Distribute 2 across the terms inside the parentheses. 2(−6y+7)−9y=14−12y+14−9y=14
Combine like terms: Combine like terms.−12y−9y+14=14−21y+14=14
Isolate term with y: Subtract 14 from both sides to isolate the term with y.−21y+14−14=14−14−21y=0
Divide both sides: Divide both sides by −21 to solve for y.−21−21y=−210y=0
Substitute y back for x: Substitute the value of y back into the second equation to solve for x.x=−6y+7x=−6(0)+7x=0+7x=7
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