Question

3x-2y+z=b
5x-8y+9z=3
2x+y+az= -1

Answer 1

Evaluate
3x−2y+z=b
Move the expression to the right side
3x=b−(−2y+z)
Subtract the terms
3x=b+2y−z
Multiply both sides
3x×
3
1
​
=(b+2y−z)×
3
1
​

Calculate
3x×
3
1
​
=
3
b+2y−z
​

Solution
x=
3
b+2y−z