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Solve using substitution.\newliney=−7y = -7\newline7x−8y=77x - 8y = 7\newline(_____, _____)

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Q. Solve using substitution.\newliney=−7y = -7\newline7x−8y=77x - 8y = 7\newline(_____, _____)
  1. Given value of y: First, we are given the value of yy, which is −7-7. We need to substitute this value into the second equation to find the value of xx.y=−7y = -77x−8y=77x - 8y = 7Substitute y=−7y = -7 into the second equation:7x−8(−7)=77x - 8(-7) = 7
  2. Substitute yy into equation: Now, we simplify the equation by multiplying −8-8 with −7-7 and then solve for xx.7x+56=77x + 56 = 7
  3. Simplify and solve for xx: Next, we subtract 5656 from both sides of the equation to isolate the term with xx.7x+56−56=7−567x + 56 - 56 = 7 - 567x=−497x = -49
  4. Isolate x term: Finally, we divide both sides of the equation by 77 to solve for xx.\newline7x7=−497\frac{7x}{7} = \frac{-49}{7}\newlinex=−7x = -7

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