Mathematics
Grade 12
45 min
Solve a system of equations in three variables using substitution
Tutorial Preview
1
Solve: x + y + z = 6, 2y - z = 1, z = 3
2
Solve: x + y + z = 9, x - 2y = 4, y + z = 7
3
Solve: x + y + z = 6, 2x - y + z = 3, x + 3y - z = 4
Sample Practice Questions
Easy
Solve the system: x + y + z = 7, 2x - z = 0, z = 4
0.(2, 1, 4)
1.(1, 2, 4)
2.(4, -1, 4)
3.(0, 3, 4)
Easy
Solve the system: x + y + z = 3, x - y = 0, y + z = 2
0.(1, 1, 1)
1.(0, 0, 3)
2.(2, 2, -1)
3.(1, 0, 2)
Easy
Solve the system: x + y + z = 4, x - y + z = 0, 2x + y - z = 3
0.(1, 2, 1)
1.(2, 1, 1)
2.(1, 1, 2)
3.(0, 2, 2)
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Solve a system of equations in three variables using substitution is a Grade 12 Mathematics lesson on ExcelOS.
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This lesson includes 25 practice questions across multiple difficulty levels, each with instant feedback and explanations.