\{ 0.7 x - 0.3 y = 2
Solve for x
x=\frac{3y+20}{7}
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0.7x=2+0.3y
Add 0.3y to both sides.
0.7x=\frac{3y}{10}+2
The equation is in standard form.
\frac{0.7x}{0.7}=\frac{\frac{3y}{10}+2}{0.7}
Divide both sides of the equation by 0.7, which is the same as multiplying both sides by the reciprocal of the fraction.
x=\frac{\frac{3y}{10}+2}{0.7}
Dividing by 0.7 undoes the multiplication by 0.7.
x=\frac{3y+20}{7}
Divide 2+\frac{3y}{10} by 0.7 by multiplying 2+\frac{3y}{10} by the reciprocal of 0.7.
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