Solve for x
x=\frac{25\Delta +9}{4}
Solve for Δ
\Delta =\frac{4x-9}{25}
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8x=50\Delta +18
Add 18 to both sides.
\frac{8x}{8}=\frac{50\Delta +18}{8}
Divide both sides by 8.
x=\frac{50\Delta +18}{8}
Dividing by 8 undoes the multiplication by 8.
x=\frac{25\Delta +9}{4}
Divide 50\Delta +18 by 8.
50\Delta =8x-18
Swap sides so that all variable terms are on the left hand side.
\frac{50\Delta }{50}=\frac{8x-18}{50}
Divide both sides by 50.
\Delta =\frac{8x-18}{50}
Dividing by 50 undoes the multiplication by 50.
\Delta =\frac{4x-9}{25}
Divide 8x-18 by 50.
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