How do you add add fraction with a different denominator?

Find the LCM (least common multiple) of the denominators, and use that as the denominator for the two fractions.

Ex.

LCM (3, 4) is 12

=

let y equal to

the total fare and x is the mile of taxi ride. so the equation is

y = 0.55x + 1.75

since susie has

$10 to spend for a taxi cab, so he can have

10 = 0.55x +

1.75

x = 15 miles of

taxi ride

so the system of

inequality is

10 < 0.55x +

1.75

x > 2