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Solve the system of equations by substitution.\newline3x−y−2z=−103x - y - 2z = -10\newlinex=−1x = -1\newline−x−2y−2z=1-x - 2y - 2z = 1

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Solve a system of equations in three variables using substitutionright chevron icon

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Q. Solve the system of equations by substitution.\newline3x−y−2z=−103x - y - 2z = -10\newlinex=−1x = -1\newline−x−2y−2z=1-x - 2y - 2z = 1
  1. Calculate total rolls needed: First, let's figure out how many rolls of tape the electrician needs by dividing the total amount of tape needed by the amount of tape on each roll.\newline8,000 cm÷2,000 cm/roll=48,000\,\text{cm} \div 2,000\,\text{cm/roll} = 4 rolls.

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