y=ax+by=ax+b
Solving for x. Want to solve for a or solve for b instead?
1
Subtract bb from both sides.
y−b=axy-b=ax

2
Divide both sides by aa.
y−ba=x\frac{y-b}{a}=x

3
Switch sides.
x=y−bax=\frac{y-b}{a}

Done
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