How do you solve #7/b=1/9#?

Related questions

• How do you solve proportions?
• What is Rational Equations Using Proportions?
• How do you solve #\frac{2x}{x+4}=\frac{5}{x}#?
• How do you use cross multiplication to solve #\frac{2}{x+3}-\frac{1}{x+4}=0#?
• What is cross multiplication?
• How do you solve #\frac{3x^2+2x-1}{x^2-1}=-2# using cross multiplication?
• How do you solve #\frac{7x}{x-5}=\frac{x+3}{x}#?
• How do you cross multiply #\frac{4x}{x+2}=\frac{5}{9}#?
• How do you solve #4/(x-3)=4#?
• How do you find fractional notation for the ratio 1.6 to 9.8?