72 miles Sophie bike last week. we get the answer by making and solving equation.
Let's take x miles, Sophie swam
from the question we get,
she runs ⇒3 × x = 3x miles
she biked ⇒ 3 × 3x = 9x miles
Then by solving, ⇒3x + 9x + x = 104
⇒ 13x = 104
⇒ x = 8
therefore, we get
9x = 9 × 8
= 72 miles
lastly, we get that she biked 72 miles last week.
There are two types of equations: identities and constraints. The ID applies to all values of the variable. Constraint expressions apply only to specific values of variables. Equations are written as two expressions joined by an equal sign.
There are three main forms of linear equations. Point-slope format, standard format, and slope-intercept format.
Learn more about the equation here: brainly.com/question/2972832
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