What is the value of x?
2 answers:
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Answer:
x =
Step-by-step explanation:
Given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = - 6 when x = 2, then
- 6 = 2k ( divide both sides by 2 )
- 3 = k
y = - 3x ← equation of variation
When y = - 22, then
- 22 = - 3x ( divide both sides by - 3 )
x = =
The augmented matrix is
Add -2(row 1) to row 2, and add -3(row 1) to row 3:
Add -1(row 2) to row 3:
Add row 3 to row 2:
Add -3(row 2) to row 1, and add -2(row 3) to row 1:
